This is brand new Atlas Copco compatible OEM equivalent unused Unloading Valve Kit 2906 0957 00 00 2906-0957-00. 2906095700 (2906-0957-00) Unloader Valve Kit-Atlas Copco Service Kit for GA GX XA ZA ZT ZE ZH. This is not a Atlas Copco parts but it is compatible and fits to Atlas Copco Air Compressors. This is a Private-label parts.