Components TUR350-EE Chrome base. May be used in place of polyurethane base. TU021 Glides. TU027 May be added to B1002 only - not applicable to any other models. Allows seat depth to be adjusted. ©1999-2011 BOSS CHAIR, Inc. All rights reserved worldwide. 5353 Jillson Street, Commerce, CA 90040, Tel:(323) 262-1919 Fax:(323) 262-2300