Filament guide and tensor 2 in 1 (Use like normal guide or tensor filaflex)

thingiverse

It can keep the normal filament in vertical position, avoiding the rubbing that causes the accumulation of particles when entering the filament into the extruder. It is designed to stretch flexible filaments, passing them through several holes to create the desired tension. As a complement, it's recommended to use the "Anet a8 bowden flex" piece, which is very useful for printing with flexible filaments and complements perfectly with this tensioner. What I appreciate most about this piece is that it has a flexible body, maintaining constant tension without sudden filament pulls like a fishing rod. It's also attached to the extruder, preventing the filament from changing its angle at all times. The only difference between these pieces is the way they guide common filaments (PLA, ABS, etc.), in crab style or moon style - it's just a matter of personal preference and needs.