28 – 30 oz. marine-grade UV stable vinyl upholstery. Corrosion-proof polypropylene seat shell. Heavy duty stainless steel rivets. Double contoured seat pan. High density, custom fitted foam padding. Allows mounting to any 5″ x 5″ standard marine swivel (swivel not included), slide, or sea spider. Includes: (2) 1/4″-20 x 3/4″ and (2) 1/4″-20 x 1″ stainless steel bolts. Dimensions: 18-1/2″ H x 18-1/4″ W x 17″ D. Mossy Oak Break-Up.