Reliable material: made of POM and 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 Creality, Ender 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, laser cutters, camera sliders, plasma cutters, robotics, furniture and other DIY machines Features: Good 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. Specifications: Material: POM, plastic Color: black Size: Outer diameter: approx. 24 mm/ 0.9 inch Inner diameter: approx. 5 mm/ 0.2 inch Height: approx. 10.23 mm/ 0.4 inch Package includes: 10 X 3D printer POM pulley wheels Notes: Manual measurement, please allow slight errors on size. The color may exist slight difference due to different screen displays.