This 24" Aluminum Ships Ladder Tread is 6" deep and comes ready to bolt to your ships ladder siderails. It is 6" deep, 1.75" tall, and 24" wide. Each end has a 1/4" bar welded to the aluminum stair tread which allows you to drill and bolt this tread to your siderail material. This product is great for anyone who is looking to build their own ships ladder or ladder platform. It is constructed of high strength aluminum and can ship immediately.