Amazon.com: BCZAMD 3D Printer Parts 1 Meter PTFE Tflon Tube for 1.75mm Filament ID 1.9mm OD 4mm Tubing for TL-Feeder Hotend Reprap Rostock Extruder Black : Industrial & Scientific
Amazon.com: Sterling Seal and Supply PTFE-0.31x12-RD PTFE Teflon Rod, 5/16" Diameter x 12" : Industrial & Scientific
Amazon.com: uxcell Plastic Round Rod 5/16 inch Dia 20 inch Length Red (POM) Polyoxymethylene Rods Engineering Plastic Round Bar(8mm) : Industrial & Scientific
Delrin Rod 20mm Diameter 300mm Long White/Black Color Polyacetal (POM) 1 Feet Long Food Grade Excellent Finish High Wear Resistance Suitable For Gear Wheels Valve Seats (White) : Amazon.in: Industrial & Scientific