Cheap And Discounts Mellow High Transparency ID3mm OD4mm PTFE Tube Teflonto MMU2.0 For prusa i3 mk3 Ender-3 Mk8 Bowden Extruder 1.75mm Filament Wholesale. Buy Directly From Merchant Mellow. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.