Heavy-Duty Aluminum Benches provide affordable, low-maintenance seating for players and fans • Seats and backs are comprised of 10" wide anodized aluminum planks • Frames are constructed of 2-3/8" heavy-guage galvanized steel for maximum support and years of use • Available in 8', 15', or 21' lengths • All sizes and styles available in portable, permanent, or surface mount installation • Optional indoor conversion kit (includes non-marring floor protectors an attachment hardware) for portable models is available for an additional cost