This Teflon Bowden tubing is designed specifically for 1.75mm filament with 2mm inner and 4mm outer diameter, helping the filament be loaded smoothly to the hotend with as little room for error as possible between the extruder and the hotend.
Accessories and DIY parts are consumables, they do wear out after a period of time depends on how frequently being used. They also require users with DIY skills to install which might causing damage if not handled properly. We can only provide limited warranty for accessories once it is being used. In case if you have any problem with our products, please read through our Returns & Refunds policy and contact us within 7 working days of receiving your order.