This in-ground permanent bench features an all aluminum construction to ensure a durable maintenance free system. The anodized 10" seat plank and backrest will provide a clean surface for years. This lightweight but heavy-duty bench is constructed of mill finished aluminum, 6061-T6 with all joints welded using the mig process. The frame, seat and backrest ends are capped with cast aluminum plugs. See middle in photo. Shown without back. Please allow 4 to 6 weeks for delivery. See our selection of powder coated finishes to give your bleachers added character. Sizes Available; 7 1/2' bench seats 5 people. 15' bench seats 10 people. 21' bench seats 14 people. All sizes are available with or without backs