Skateboard truck bushing is made of high quality PU , durable , lightweight Used to improve your skates truck performance , smooth and good skating experience 10 Pieces per pack , including 2pcs bottom bushings , and 2pcs top bushings , and 6pcs cups set : 3.25inch , 5inch , 7inch 92A hardness , high elasticity for shock proof , wear and corrosion resistant Accessories set for skateboard , longboard , truck , etc. in outdoor sports Specification: Material : PU Size Chart: For Conical Bushing : Size ( HxTopxBottom): Approx. 11x16x24mm/0.43x0.63x0.94inch Cylinder Bushing : Size ( HxTopxBottom): Approx. 16x24x24mm/0.63x0.94x0.94inch Circle inner diameter : Approx. 9mm/0.39inch For Cups : 3.25inch : Size ( IDxOD ): Approx. 10x12mm/0.39x0.47inch 5inch : Size ( IDxOD ): Approx. 12x16mm/0.47x0.63inch 7inch : Size ( IDxOD ): Approx. 14x19mm/0.55x0.75inch Package Includes: 10 Pieces Skateboard Truck Bushings Set(2 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 3. Wish you a wonderful on-line shopping!