The popular 8500 Series Ultra-Compact stack chair stacks up to 40 units high for quick clean-up and efficient storage in cafeteria-type settings. Each has an 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. The 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. Available with or without a steel under-seat book rack and/or a spacious, removable, black-laminate, flip-up tablet arm for either right or left-handed users.