This package including gear, rack, pulley and belt drive a total of 75 parts, photo as the photo. Many parts are our own design and production, other places cant buy accessories variety is complete, the experiment is scientific research, popular science activities, personal diy models such as the necessary machinery accessories, 75 kinds of gear package, It can be used whether model, toys, cars, planes, remote control toys. This package including gear, rack, pulley and belt drive a total of 75 parts 9 kind of Spindle gear 11 kind of Crown gear 12 kind of Single gear 19 kind of Double gear 7 kind of Belt pulley 2 kind of Worm gear 5 kind of Belt 2 PCS Connect rack 6 PCS Axle sleeve 1 PC Tee Axle Sleeve 1 PC Bevel gear Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-46428 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it