Contoured plastic seating surfaces are comfortable and easy to clean Designed for comfort, constructed to last. The seating surfaces are gently contoured to keep you comfortable longer. Rugged plastic instantly wipes clean with a cloth or sponge, so it's never a chore to keep them looking sharp. Gleaming steel frame is stylish and tough! The rugged steel frame is durable enough to ensure years of dependable service. And it's chrome-plated, giving your new chair a sleek, space-age look that will be right at home in any setting where temporary seating is necessary. Built-in ganging brackets - attach whole rows of chairs! Convenient built-in connectors make it easy to add, remove or rearrange rows of chairs in a flash. Stack 20 high to save storage room. Chairs can easily be nested up to 20 high when not in use to conserve precious space in your home or office. Passed California 133 Flammability Test for your safety. For your protection and peace of mind, this chair met the standards for fire safety set by California law. Optional removable arms are sold separately. The optional dolly lets you nest chairs higher and transport them more easily. Stack up to 25 high on optional dolly (sold separately). Be confident in your purchase! You can rest assured your chair has met quality standards for safety and durability established by The American National Standards Institute (ANSI) and The Business and Institutional Furniture Manufacturers Association (BIFMA). Meets or exceeds ANSI/BIFMA Performance Standards. Easy assembly instructions included. 33in.H x 21in.W x 22in.D. Backed by the manufacturer's limited lifetime warranty. Chairs sold in packs of 4. OFM Multi-Use Stack Chair, Plastic Seat Back, 33in.H x 21in.W x 22in.D, Black Fabric, Pack Of 4 is one of many Stacking Chairs available through Office Depot. Made by OFM.