Description:This support bracket, with keel rollers included, can be installed on a boat trailer to support the bottom part of the boat, which makes it an indispensable boat trailer part. Since the width of our bottom support bracket can be adjusted, it is perfect for boats from 80 a€“ 124 cm wide, which suits both big and small ones. Constructed of high quality zinc-coated steel, this bottom support bracket will certainly offer you a long-term service life.Specification:Item Type: Boat Trailer Bottom SupportMaterial: SteelColor: As Pictures ShowSteel Thickness: 1.5 mmMaximum Capacity: 800 kgKeel Roller Diameter: 11 cm / 4.3inchWidth: 80-124 cm(increase/decrease by 2 cm each) / 31.5-48.8inchWeight: Approx. 10kgPackage includes:1 * Boat Trailer Bottom SupportNote:1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.