Designed for prolonged seating comfort. Versatile weatherproof seats, double-contoured, roomy, and produce a combination of multidirectional flexibility w/full support, increased shock absorption and reduced seating fatigue. Molded w/deep-rolled front edges to eliminate pressure points, seats and backs have textured surfaces for sitting traction. Seats may be upholstered in a variety of ways. The fold-down back features self-lubricating hinge points. Molded rib pattern accommodates spiders w/5" x 5" or 5-5/8" x 5-5/8" hole pattern for easy customer installation of four 1/4-20 insert nuts (not included). Dimensions: 18-1/4"W x 17"D x 16-1/2"H.