Jobri Jazzy Kneeling Chair. The newest addition to the range and proving very popular. Supplied with a brushed aluminum starbase and hydraulic lift for an elegant appeal, for those seeking a good ergonomic posture and visco elastic memory foam in seat and knee pad. Gas height adjustment. Supportive Visco Elastic memory foam covered with durable fabric Chair back included Overall width: 16.5′ Height range: 22′ to 27′ Seat size: 16.5′ x 14′ Knee cushion size: 16.5′ x 9.5′ Assembly Required. Materials: Polyurethane foam and steel. Dimensions: 27’L x 27’W x 40’H Weight: 28 lbs.