<h3 dir="auto">Problem description</h3>
<p dir="auto">Sometimes the Divider Component display a 2px thickness, when no custom styles have been applied.</p>
<h3 dir="auto">Steps to reproduce</h3>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="         &lt;List&gt;
               &lt;ListItem disabled={true}&gt;
                  &lt;div className={classes.detailTitle}&gt;Trade Miles&lt;/div&gt;
                  &lt;div&gt;{tradeInfo.miles}&lt;/div&gt;
                &lt;/ListItem&gt;
                &lt;Divider/&gt;
                &lt;ListItem disabled={true}&gt;
                  &lt;div className={classes.detailTitle}&gt;Trade Payments&lt;/div&gt;
                  &lt;div&gt;{tradeInfo.payment}&lt;/div&gt;
                &lt;/ListItem&gt;
                &lt;Divider/&gt;
                &lt;ListItem disabled={true}&gt;
                  &lt;div className={classes.detailTitle}&gt;Trade Payoff&lt;/div&gt;
                  &lt;div&gt;{tradeInfo.payoff}&lt;/div&gt;
                &lt;/ListItem&gt;
                &lt;Divider/&gt;
                &lt;ListItem disabled={true}&gt;
                  &lt;div className={classes.detailTitle}&gt;Down Payment&lt;/div&gt;
                  &lt;div&gt;0&lt;/div&gt;
                &lt;/ListItem&gt;
                &lt;Divider/&gt;
                &lt;ListItem disabled={true}&gt;
                  &lt;div className={classes.detailTitle}&gt;Must Haves&lt;/div&gt;
                  &lt;div&gt;0&lt;/div&gt;
                &lt;/ListItem&gt;
            &lt;/List&gt;"><pre class="notranslate">         <span class="pl-c1">&lt;</span><span class="pl-ent">List</span><span class="pl-c1">&gt;</span>
               <span class="pl-c1">&lt;</span><span class="pl-ent">ListItem</span> <span class="pl-c1">disabled</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-c1">true</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span> <span class="pl-c1">className</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-s1">classes</span><span class="pl-kos">.</span><span class="pl-c1">detailTitle</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>Trade Miles<span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span><span class="pl-kos">{</span><span class="pl-s1">tradeInfo</span><span class="pl-kos">.</span><span class="pl-c1">miles</span><span class="pl-kos">}</span><span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">ListItem</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">Divider</span><span class="pl-c1">/</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">ListItem</span> <span class="pl-c1">disabled</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-c1">true</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span> <span class="pl-c1">className</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-s1">classes</span><span class="pl-kos">.</span><span class="pl-c1">detailTitle</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>Trade Payments<span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span><span class="pl-kos">{</span><span class="pl-s1">tradeInfo</span><span class="pl-kos">.</span><span class="pl-c1">payment</span><span class="pl-kos">}</span><span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">ListItem</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">Divider</span><span class="pl-c1">/</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">ListItem</span> <span class="pl-c1">disabled</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-c1">true</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span> <span class="pl-c1">className</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-s1">classes</span><span class="pl-kos">.</span><span class="pl-c1">detailTitle</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>Trade Payoff<span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span><span class="pl-kos">{</span><span class="pl-s1">tradeInfo</span><span class="pl-kos">.</span><span class="pl-c1">payoff</span><span class="pl-kos">}</span><span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">ListItem</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">Divider</span><span class="pl-c1">/</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">ListItem</span> <span class="pl-c1">disabled</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-c1">true</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span> <span class="pl-c1">className</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-s1">classes</span><span class="pl-kos">.</span><span class="pl-c1">detailTitle</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>Down Payment<span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>0<span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">ListItem</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">Divider</span><span class="pl-c1">/</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-ent">ListItem</span> <span class="pl-c1">disabled</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-c1">true</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span> <span class="pl-c1">className</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-s1">classes</span><span class="pl-kos">.</span><span class="pl-c1">detailTitle</span><span class="pl-kos">}</span><span class="pl-c1">&gt;</span>Must Haves<span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                  <span class="pl-c1">&lt;</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>0<span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">div</span><span class="pl-c1">&gt;</span>
                <span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">ListItem</span><span class="pl-c1">&gt;</span>
            <span class="pl-c1">&lt;</span><span class="pl-c1">/</span><span class="pl-ent">List</span><span class="pl-c1">&gt;</span></pre></div>
<h3 dir="auto">Versions</h3>
<ul dir="auto">
<li>Material-UI: v0.15.4</li>
<li>React: V15.3.1</li>
<li>Browser: Chrome</li>
</ul>
<p dir="auto">The divider behavior in my code sandbox is weird. Sometimes is shows up thicker and sometimes they don't even show up. This can be reproduced by cmd+/- on mac to adjust the zoom on your browser. Please see screenshots attached for examples.</p>
<h2 dir="auto">Expected Behavior 🤔</h2>

<h2 dir="auto">Current Behavior <g-emoji class="g-emoji" alias="hushed" fallback-src="https://github.githubassets.com/images/icons/emoji/unicode/1f62f.png">😯</g-emoji></h2>

<h2 dir="auto">Steps to Reproduce <g-emoji class="g-emoji" alias="joystick" fallback-src="https://github.githubassets.com/images/icons/emoji/unicode/1f579.png">🕹</g-emoji></h2>
<p dir="auto"><a href="https://codesandbox.io/s/mmnoyvq9oy" rel="nofollow">https://codesandbox.io/s/mmnoyvq9oy</a></p>
<h2 dir="auto">Context 🔦</h2>
<p dir="auto">Just trying to make my dialogs work in a few different contexts</p>
<h2 dir="auto">Your Environment <g-emoji class="g-emoji" alias="earth_americas" fallback-src="https://github.githubassets.com/images/icons/emoji/unicode/1f30e.png">🌎</g-emoji></h2>
<table role="table">
<thead>
<tr>
<th>Tech</th>
<th>Version</th>
</tr>
</thead>
<tbody>
<tr>
<td>Material-UI</td>
<td>v3.9.1</td>
</tr>
<tr>
<td>React</td>
<td>16.8.4</td>
</tr>
<tr>
<td>Browser</td>
<td>Chrome</td>
</tr>
</tbody>
</table>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/19512370/54080233-42893680-42a0-11e9-8948-51dec5e11494.jpeg"><img src="https://user-images.githubusercontent.com/19512370/54080233-42893680-42a0-11e9-8948-51dec5e11494.jpeg" alt="Screen Shot 2019-03-09 at 7 17 40 PM" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/19512370/54080235-4452fa00-42a0-11e9-9e8a-68bab25b9b45.jpeg"><img src="https://user-images.githubusercontent.com/19512370/54080235-4452fa00-42a0-11e9-9e8a-68bab25b9b45.jpeg" alt="Screen Shot 2019-03-09 at 7 17 49 PM" style="max-width: 100%;"></a></p>