Wise Blast-Off Tour Series 17-Inch Center Buddy Seat Center "Buddy" Seat, Designed to Mix & Match with Wise "Blast-Off" Tour Series Seating With 2 Integrated Cup Holders and Step Surface Back Heavy Duty Marine Grade 28 oz. Vinyl and Marine Grade Frame System with WD11 Flat Piano Type Hinge included State-of the Art High Impact Marine Grade Frame Seat Dimensions - Height: 17", Width: 17", Depth: 18", Seat Depth: 13.5"