WNA Caterline® Casuals™ Thermoformed Platters, Black Safety Adjustable Height: Adjustable Adjustable Seat ACMI AP nontoxic certified Adjustable Height: Adjustable Adjustable Seat Depth: No Arm Type: Height Adjustable Assembly Information: Full Assembly Required Brand Name: Beautyrest Chair Base Type: Casters Chair Center Tilt: No Chair Lumbar Support: Fixed Chair Synchro Tilt: No Chair Type: Task Color Family: Black Commercial Grade Furniture: Commercial Grade Depth in Inches: 28 Ergonomic: Ergonomic Furnishing Material: Mesh Height in Inches: 46 This dual powered platform operates from an AC adapter (included) or four AA batteries (not included) that provide up to 168 hours of battery life Brand Name: WNA thermoformed PET platters are crack and crush resistant