I'm new to this game, and recently upgraded the hotend on my Ender 3 Pro to a *clone* of an E3D V6, as I'm keen to do nylon prints at some point. I noticed however that this one I got has a teflon liner which seems to negate the advantage of a metal hotend entirely.

I'm wondering what temperature it's safe to run this hot end up to?

[![Teflon insert#1](https://i.stack.imgur.com/6Uth3.jpg "Teflon insert#2")](https://i.stack.imgur.com/6Uth3.jpg "Teflon insert#2")

[![Teflon insert#2](https://i.stack.imgur.com/QazJ2.jpg "Teflon insert#1")](https://i.stack.imgur.com/QazJ2.jpg "Teflon insert#1")