Wise Blast-Off Standard Pro Casting Seat Wise 8WD1466 Blast-Off Series Standard Pro Casting Seat High Impact Plastic Injection Molded Frame High Compression Foam Padding, Marine Grade UV and Mildew Treated 28 oz. Vinyl with Double Top-Stitch Construction Mounts to a BIA Standard 4 Bolt Pedestal System Seat Dimensions - Height: 5", Width: 15.5", Depth: 11", Seat Depth: 8"