This comprehensive combination package is Ideal for model enthusiasts looking to enhance their projects. The rubber bands, plastic pulleys, and gears are designed to work together seamlessly, providing smooth and efficient motion. The materials ensure durability and reliability, making this package an essential addition to your model-building toolkit. Features -Color:Assorted Color -Material:Plastic, rubber -Size:2.50X2.50X0.30cm/0.98X0.98X0.12in -High durability: made from rubber, these belts are highly durable and resistant to wear, ensuring a long lifespan -Quiet performance: the rubber band and plastic pulley combination significantly reduces noise, providing a smoother -Easy to install: these model accessories are designed for easy and quick installation, making them userfriendly -Wide range of applications: suitable for various , this combination package offers versatile usage options -Reliable efficiency: provides stable transmission, improving the overall efficiency and productivity of your equipment Package list: 400 x pulleys 400 x rubber bands 40 x transmission belts