Reliable material: made of plastic, its nice abrasion performance, flame retardancy and inoxidizability can assist your 3D printer to complete its work well Wide compatibility: it is applicable for the V slot profile of most DIY 3D printers, including, but not limited for , 3, Anet and more Nice performance: these 3D printer wheels move smoothly, have low noise and high printing accuracy, and can nicely increase the printing speed, which are useful 3D printer accessories Package includes: you will receive a package containing 16 pieces 3D printer POM pulley wheels, which are suitable for most DIY 3D printers and have a long service life Wide application: they are not only suitable for 3D printers, but also suitable for engravers, hot wire machines, cutters, camera sliders, plasma cutters, robotics, furniture and other DIY machines Material:plastic colour:Black Package Contents: 16 X 3D printer POM pulley wheels Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.