Designed for long-lasting protection to your dock. These bumpers are constructed of UV-resistant, tear-proof vinyl/polyester tri-laminate and filled with high-density, closed-cell polyethylene foam. Four corrosion-proof grommets provide easy mounting to dock. Vertical mounting holes measure 3-1/4" center-to-center. 24"L x 4"W x 2.5"D. Four corrosion-proof grommets 24"L x 4"W x 2.5"D | Straight Dock Bumper in White