Description This pulley combination package includes rubber transmission belts, rubber bands, and plastic pulleys, making it an ideal set for model enthusiasts. The components are designed to fit various DIY projects, from toy cars to science experiments. The durable materials ensure long-lasting performance, providing a reliable solution for your mechanical needs. Features -Color:Multi -Material:Plastic, rubber -Size:2.50X2.50X0.30cm/0.98X0.98X0.12in -Durable rubber transmission belt: the rubber transmission belt is designed to be wear resistant, ensuring a long time use for your projects -Noise reduction: the rubber band and plastic pulley combination helps to reduce noise, providing smooth and quiet operation -Precision model accessories: these precise model accessories are easy to install and remove, making your diy projects easy -Versatile use: suitable for a variety of devices, this pulley kit offers multifunctional applications for different projects -Stable transmission: provides stable transmission effects, enhancing work efficiency and performance in your mechanical setupsPackage list: 40 x pulleys 40 x rubber bands 2 x transmission belts