weight plates
... that 45-pound (20 kg) weight plates have been known to weigh as little as 38 pounds (17 kg) or as much as 59 pounds (27 kg)?
... that <span about="#mwt60" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"45"},"2":{"wt":"lb"},"3":{"wt":"kg"},"adj":{"wt":"on"}},"i":0}}]}' id="mwBSs" typeof="mw:Transclusion">45-pound (20</span><span about="#mwt60" typeof="mw:Entity"> </span><span about="#mwt60">kg)</span> <b id="mwBSw"><a href="./Weight_plate" id="mwBS0" rel="mw:WikiLink" title="Weight plate">weight plates</a></b> have been known to weigh as little as <span about="#mwt61" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"38"},"2":{"wt":"lb"},"3":{"wt":"kg"}},"i":0}}]}' id="mwBS4" typeof="mw:Transclusion">38 pounds (17</span><span about="#mwt61" typeof="mw:Entity"> </span><span about="#mwt61">kg)</span> or as much as <span about="#mwt62" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"59"},"2":{"wt":"lb"},"3":{"wt":"kg"}},"i":0}}]}' id="mwBS8" typeof="mw:Transclusion">59 pounds (27</span><span about="#mwt62" typeof="mw:Entity"> </span><span about="#mwt62">kg)</span>?