Lightweight! Comfortable! Durable! Our popular Ultra-Compact stack chair stacks up to 40 units high for quick clean-up and efficient storage in cafeteria-type settings. Features: 500 lb. weight capacity Injection-molded, textured, polypropylene, waterfall-style seat and flexible backrest contoured for maximum ergonomic comfort The plastic won't fade or scratch and is easy to keep clean Durable 11mm solid steel-rod chrome-plated frame features under-seat ribbing for reinforced support and prevents cracking Chair is lightweight, with a built-in backrest handle allowing for easy portability Sled-style base moves easily over carpeted surfaces while clamping protective glides keep floors unscathed Stacks up to 40 chairs high on the optional dolly Optional accessories include a steel under-seat book rack and/or a spacious, removable, black-laminate, flip-up left tablet arm or right tablet arm.