305 lbs. (30 Seats) All-aluminum bleacher seat planks and steel under structure provide a lightweight, stable bleacher. Seat planks are 10" wide non-skid aluminum. Planks are supported by a strong, galvanized steel understructure made of 3/16" x 1-1/2" steel angle. Planks and understructure can be powder coated to match your team colors! Ships Freight.