Double action trucks are made of high-quality aluminum alloy, light but durable. The roller skate truck replacement parts are cast in one piece, which is strong and not easy to break. Aluminum alloy truck castings are surface polished, smooth without bumps. The axle length on both sides of the roller skate plate truck is 33mm, and the axle diameter is 8mm. Each pack includes 2 pcs roller skate triangle trucks only, no other hardware and screws. Additional mounting hardware and screws not included!!! Please confirm before ordering! Colour:Silver Material:aluminum alloy Package Contents: 2 * roller skate triangle trucks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!