HAJXZH 4 PCS Skateboard Truck Replacement Pivot Cups 18 mm / 0.71 inch Skateboard Stand Protector for Most Skateboards

["Material: Made of PU","Size: Inner diameter: 14 mm / 0.55 inch; Outer diameter: 18 mm / 0.71 inch; Height: 15 mm / 0.59 inch","Easy to install: No tools required, just install it on the skateboard truck","Application: Suitable for most 6\" and 7\" longboard or land surfboard mounts with an 18 mm / 0.71\" pivot hole diameter","Package includes: 4 pcs Skateboard Replacement Pivot Cups"]