This 8 foot bench with back is made for lifelong durability because of its plastic coated rolled 3/4" expanded metal. Rolled to a 3" radius edge, it also has extra bracing of 11/2 x 1/4 inch steel flats and 2 3/8" galvanized steel legs for support. Surface Mount for resistance to vandalism. Commercial outdoor thermoplastic benches from Park Tables are made to last for years with little to no maintenance.