This 8 foot bench without back is made of 2 3/8 inch O.D. galvanized tube with 1 1/16 inch cross brace and a portable frame. The seat is fiberglass built with a reinforcing core for durability. To guard against up ending or tipping, end overhang is only 6 inch. These benches are perfect for indoor or outdoor use. Fiberglass benches are commercial quality outdoor furniture for schools, parks, and locker rooms.