This is a skateboard bracket vertex set, and it has a good shockproof function, which can give you a more professional skateboarding experience. And these devices can make your skateboard more stable and safe, and you can have a more relaxing skateboarding playing. Features -Color:Black-Material:PU-Size(L):1.80X1.80X1.50cm/0.71X0.71X0.59in-Size(S): 1.50X1.50X1.30cm/0.59X0.59X0.51in-Made of PU which is durable and lightweight.-The seal of the gel should be broken by sanding file and totally removed the tops layer.-Fits most trucks. Keep Longboard/ skateboard trucks flexible-A small but essential accessory to help your skateboard exercise.-Skateboard may break up or lose its toughness if Pivot Cup too hard. And it too supple will cause the skateboard to be difficult to control. These Pivot Cups Fits Perfectly with the Skateboard Truck.Packing list: 2 x Sets of Longboard Truck Replacements