This 6 foot bench with back is made of 2 3/8 inch O.D. galvanized tube with 1 1/16 inch cross brace and portable frame for convenience. The seat and back is made of 2 x 10 fiberglass planks that are commercial grade and durable. To guard against up ending or tipping, end overhang is only 6 inch. Fiberglass benches are easy to clean and low maintenance, making them perfect for parks and schools.