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Jun 2015

I think they come with a new Teflon decoupler now that doesn’t wear out as fast.

Yes they are now delivered with a spare Teflon, a complete spare head and PT100 (temp sensor).

did not know that, but they should also be made of different material (glass filled).

Starting at least a year ago UM switched to glass filled teflon. I’m not convinced they are any better. Some people at UM did some testing and concluded they were better. Anders Olsson I believe concluded they are worse (I could be confused about this). I have had no problem with either type (tried both) as I tend to keep things cool (typically 210C) and rarely stray from PLA. They are inexpensive. If you plan to print often at 250C or hotter I recommend you get the i2k from 3dsolex which will keep the teflon at 100C! But only if you do no retraction, lol. As soon as you do retraction it can bring molten plastic up into the teflon and warm it right up. 3dsolex also sells something they call the IPM which is horrible for PLA (molten pla sticks to it) but works great for ABS and other materials that need higher temperatures.

Anyway the teflon parts are relatively cheap (about $12 or €12 each from 3dsolex).