Cross braces for the breadth and depth of the frame are fastened with aircraft-style rivets.Blow-molded plastic bench with a sturdy, corrosion-resistant aluminum frame. perforations for drainage lessen sliding.Euro-style clasp for adjusting leg height Height can be changed in 1" stepsManufactured from recyclable materialsSeat Height 14" - 19" Size of seat20" (W) x 12" (D) Outside Legs17.5" (W) x 17.25" (D)Weight7.5 lbs. | 6.0 lbs. Weight Capacity500 lbs.