... /gas lift/gas cylinder/gas strutUseUsed for boss chair/ office chair/bar chair etc.QualityNANT Gas Spring have good reputation all ... .TypeStroke for different kind of chairs.Boss chair: 60mm, 80mmOffice Chair: 100mm, 120mm, 140mm, 160mmBar Chair: 180mm, 200mm, 260mm, 330mmSampleAll the ... five year warranty (Best)Trade TermFOB Shanghai or C&F price if you need Company NameChangzhou Nantai Gas Spring Co ...