This replacement belt pulley is made of sturdy PP material, which can withstand long-lasting use. Features the PPmaterial, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color:White -Material:PP -Size:0.93X0.40X0.40cm/0.37X0.16X0.16in - Outer diameter: 9.3mm - Aperture: 2mm -This pulley gear is a trustworthy and long-lasting option for use in scientific and educational settings. - With the great workmanship, it can be used to repair and fix your handicraft or toy. They can be the great DIY accessories. - Outstanding workmanship, reasonable design, stable and practical, will bring you a good using experience. - These replaceablegears are stronger and wear-resistant, and can ensure long-term use. - This pulley gear is constructed with PP materials and craftsmanship, ensuring it will last for a long time. Package list: 50 x gears