The plastic belt pulley gears in this package are engineered for optimal performance and durability. They are Ideal for use in DIY projects, allowing you to create custom models with ease. The combination of rubber belts and plastic pulleys ensures smooth and efficient , making this package a must-have for any model enthusiast. Features -Color:Assorted Color -Material:Plastic, rubber -Size:2.50X2.50X0.30cm/0.98X0.98X0.12in -Materials: made from rubber, these belts are designed to last, offering excellent wear resistance and longevity -Noise reduction: the rubber band and plastic pulley set significantly reduces noise, ensuring a smooth and quiet -Easy to use: these model accessories are easy to install and remove, making them convenient for users -Versatile applications: Ideal for various mechanical systems, this combination package offers a wide range of applications -Stable performance: ensures stable transmission, enhancing the efficiency and reliability of your machinery Package list: 80 x pulleys 80 x rubber bands 8 x transmission belts