Material: Made of aluminum, used to increase speed and extend bearing life by reducing the friction between the bearing and the shaft nut and the hangar. Function: These bushings will keep your skateboard in a good riding condition, reduce wheel jitter, keep the bearings parallel, increase speed and accuracy, and reduce bearing wear. Suitable for: These bushing cup washers are compatible with most small fishboards, skateboards, and longboard trucks. Purpose: Skateboard truck bushing gaskets are metal discs placed above and below the bushing to bring the skateboard back The starting position after the turn. Screws and nuts are used for truck repair or reconstruction. Item Type: Skateboard Bushing Washer Set size: 25x2MM Material:aluminum colour:Blue Package Contents: 4 x Skateboard Washers Only the above package content, other products are not included. Note: Light 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.