With this boat support bracket with keel rollers a boat can be optimally supported. The 43.30' long bracket is installed on a boat trailer and safely supports the keel of the boat. Due to the adjustable width of the bracket, boats with a width between 24.61 and 40.60inch can be held. This makes the holder suitable for smaller and bigger boats. The support bracket is made of high-quality galvanised steel and has a maximum load capacity of 1760lbs. With Super-Heavy-Duty Rubber keel rollers for boats,helps to absorb road shock while boat is being towed Specifications Material: Steel Weight: 18 lb Maximum capacity: 1760 lbs Keel roller size: 3.19x7.09' size 43.30 length ,height adjustable 7.87-17.13inch