Welded seams on 30 oz marine grade vinyl make this impervious to water, an upgraded, thicker high density foam insert, and our no pinch hinge w/lock. Built to withstand harsh conditions, keeping you on the water longer! Stainless hinge pins secure the fold down back and included t-nuts allow mounting to most standard marine swivels, slides, or seat spiders. The Profile Seat Shell will also accept our Quick Disconnect Kit. Includes 1/4" x 20" t-nuts and custom fitted cushion. Color Charcoal/Gray Size 18" H x 19" W x 19" D