The Filament Holder is made of high quality metal, very sturdy and well made and fully adjustable
This Mount Rack Bracket has 4pcs bearing pulleys and wheels are holding up well and Roll freely and smooth
The Filament Holder Width can be adjusted about 26mm-126mm to adapt to different filament reels, the range of the material Rack Bracket is moveable adjusts to whatever size you use, which is more flexible