Kwik Tek HHB-24W Hull Hugr Dock Bumper (24 by 4 by 2.5 Inches) Measures 24 by 5 by 2.5 inches Constructed of UV-resistant and tear-proof vinyl and polyester tri-laminate Features four corrosion-proof polycarbonate grommets for mounting to docks Filled with high-density, closed-cell polyethylene foam