Description: If you are a model amateur, you would know that belt pulleys and rubber bands are essential and necessary parts for models. Aircraft, automobiles, boats, robots and other small production of science and technology will all need to use them. Here we provide many pulleys and rubber bands of different sizes which may meet your basic needs for model making. Features: Made of high quality plastic, these parts are wearable and have long service life. The products are for toys belt pulley and rubber band spare parts, suitable for DIY model technology production. Small parts, easy to use, great model making accessories for all kinds of cars, robots, etc. These accessories come in many different sizes so you can easily find which one you need. They are also good replacement parts for old or broken ones when repairing toys. Specifications: Material: Plastic, rubber Weight: 57g(approx.) Package Includes: 3pcs x 36mm Belt Pulleys 6pcs x 24mm Belt Pulleys 6pcs x 19.6mm Belt Pulleys 6pcs x 18mm Belt Pulleys 6pcs x 16.8mm Belt Pulleys 6pcs x 15.5mm Belt Pulleys 6pcs x 13mm Belt Pulleys 6pcs x 9.3mm Belt Pulleys 6pcs x 6mm Belt Pulleys 3pcs x CDD2*50 Bands 3pcs x CDD2*70 Bands 10pcs x 20mm Rubber Bands 10pcs x 25mm Rubber Bands 10pcs x 35mm Rubber Bands 10pcs x 40mm Rubber Bands 10pcs x 45mm Rubber Bands Note: There might be small quantity error in each set. Thanks for your understanding. 1、Made of high quality plastic, these parts are wearable and have long service life 2、The products are for toys belt pulley and rubber band spare parts, suitable for DIY model technology production 3、Small parts, easy to use, great model making accessories for all kinds of cars, robots, etc 4、These accessories come in many different sizes so you can easily find which one you need 5、They are also good replacement parts for old or broken ones when repairing toys