Timing Belt: The timing belt is made of premium rubber, durable and flexible.
Pulley Wheel: 20T 5mm bore Aluminum GT2 Timing Belt Pulley,Adopt high quality aluminum, excellently machined, finished smoothly.
Tensioner Spring Torsion:GT2 Timing Belt Tensioner Springs made of premium metal,Keeps the belts snug and prints are much more precise.
Combo Package: The original packaging make sure your printer easy to set up ,Very good compatibility ,much more precise and smoothly.
Best Choices: Best choices for Reprap, Prusa, MendelMax, 3d printer construction.100% service satisfactory.