Corner-Mount Dock Wheel, Smooth Rolling Dock Wheel Bumper with Dock Brackets Hardware, Guiding Your Boat in and out Dock Smooth rolling wheels safely guide boat slipping in & out dock and boat lift, especially in the wind and current; Install on the dock corner to keep the bow off the dock corner to avoid damage to the boat; Smooth rolling wheels provide substantial dock cushioning to avoid impacting, scratching your boat docking and damage your dock. Reliable Dock Wheel Bumper with Dock Bracket Marine-Grade Inflatable Dock Bumper Wheel Constructed from marine-grade rotomolded vinyl with sturdy ribs, featuring soft, tough, UV-resistant, impact-resistant and anti-tear to ensuring long- lasting protection against impacts. Hardware Corner Dock Brackets Made of sturdy iron with rust proof baking finish, adequate thickness provides exceptional strength, ensuring long-term support for the dock wheel bumper; Dock bracket hardware for dock corner to mounts securely to the dock wheel bumper. Color and Size Options Color: White / Black Dia of Wheel: 9 inch / 12 inch / 18 inch