①. The 3D printer pulley is convenient and practical, with good texture, and can serve you for a long time without being easily damaged. The craftsmanship can serve you well without breaking easily. This is a practical 3D printer pulley. ②. Features -Color:Black -Material:Plastic -Size:2.40X2.40X1.00cm/0.94X0.94X0.39in - Brings to all DIY 3D printers, practical replacement pulley wheel for broken one. - These 3D printer wheels move smoothly, have low noise, and print with high accuracy, which can improve the printing speed well, which is a useful 3D printer accessory. - Wheels have good physical, mechanical and chemical properties, especially have good wear-resistance, and sturdy. - They are suitable for working with the 3D printer, easy to install, very convenient. - Adoption of simple and convenient design, this product also can be used for a long time. ③. Package list: 16 x Roller Wheels