6mm Tube Makergear M2 Filament Guide Support Arm for 1.75mm filament

Two sizes, 6mm works great with 6mm OD teflon tubing which I highly recommend as it will always provide the least restriction even when using 1.75 mm filament. If your filament happens to have any bends when coming off the spool that puts restriction on the extruder as its being pulled through a small tube, give the extruder an easier time by using the 6mm OD tubing.

Buy the tubing from Mc-Master Carr, this is known good quality tubing, unlike the unknown stuff you can get on Ebay. Only $