Sidewind heavy duty dock edging provides additional protection while docking. Made from premium marine grade PVC, attaches easily to most wood or metal docks. The PVC is UV protected to resist discoloration. Microguard provides protection against mold and mildew. Nitrogen filled to maintain inflation longer than air filled versions. 4” x 9” x 9” (10.16 cm x 22.86 cm x 22.86 cm). Corner Piece.