Ensure your filament is delivered smoothly to your hotend with our premium PTFE bowden tubing. Unlike a lot of other suppliers, ours are manufactured for us, specifically for 3D printing applications by Chicago Tube™. Specs: Genuine Teflon® Material (lowest friction on the market) High-Temperature Resistance (275°C Max*) OD: 4mm - ID 1.9mm Print Flexible Materials Lower Retraction Settings Manufactured by Chicago Tube™ to our specifications Length: 1 meter (Approx. 39 inches) *Warning: Many manufacturers are incorrectly claiming their tubing can withstand temperatures beyond 275°C. We have spoken directly with the parent company of Teflon® and have confirmed this is unsafe because of the fumes that are released above this temperature.