These self-centering bunk glide on's are expertly manufactured with Tie Down's enhanced polyvinyl material, designed to provide a smooth surface that makes guiding your boat onto the trailer easier than ever. Compatible with 2x4 boards, each bunk glide on measures 4 ft. in length, offering ample coverage to ensure proper boat alignment during both launching and loading processes. Sold in packs of 4 pieces, our Bunk Glide On's provide a complete and convenient solution for outfitting your boat trailer with reliable and user-friendly bunk support. Choose from either black or white color options, allowing you to customize the look of your trailer to suit your preference.