KAILIDA GAS SPRING FOR OFFICE CHAIR . HIGH PRESSURE DON'T HEAT UP OR OPEN SGS-BIFMA ... --120mmWEIGHT--930gMATERIAL--20# Steel TubePACKING--10pcs/box FIT FOR--Office Chair ,Machine, Car , Cabinets and so on .= = = =INTRODUCTION= = = =Kailida Gas Springs ... .We are the professional of producing gas springs for office chair.From the beginning of our company set up,our products ...