Features These gears kits made of high-quality plastic have a beautiful appearance, good workmanship, are wear-resistant and durable and have a long service life. These products are spare parts such as pulleys for toy transmissions, small, lightweight, easy to carry, suitable for the production of DIY models and the effect is very good. You can choose from six different sets that you can choose according to your needs. Easy to use, easy to use, these plastic gears are a great accessory for model making for all types of cars, robots and more. They are also the perfect replacement for old or damaged parts with solid performance. Specifications: Main material: plastic. Type: 34 types, 60 kinds, 64 types, 75 types, 80 types, 84 types (optional) Package includes: 1 set x timing belt pulley kits. Package List