The Alvin Argentum Mesh Back Office Chair CH728-45 has a height adjustable back made of breathable silver-colored mesh curved just right to give you proper lumbar support. This ergonomic chair has multiple controls for the seat and back, allowing you to choose whether you want the back to rock independently of the seat, or synchronized with it. The contoured seat is covered with stain-resistant black fabric. The molded foam seat cushion measures 19½"L x 18"W x 3"H. The back rest measures 19½"W x 19½"H. Seat height is adjustable from 17" to 21" using the pneumatic control lever. This adjustable chair has a polished aluminum 5-arm base 26" in diameter with 5 swiveling wheels.
Some assembly is required.