This is a set of pontoon flush ladder mounting hardware attachment kit for pontoon boat removable ladder, but it works with most flush ladders. One set contains: Two (2) Stainless Steel 304 plates secure the ladder to the deck. Two (2) Plastic shim plates. Eight (8) Stainless screws. Dimension of stainless plates: 6.4cm x 4.4cm . Dimension of plastic shim plates: 4.1cm x 2.2cm . Item# PDSA0313.