1.Chair Components,Gas Spring, Gas Lift 2.Model:NT-B, NT ... Products NameGas spring/gas lift/gas cylinder/gas strutUseUsed for boss chair/ office chair/bar chair etc.QualityNANT Gas Spring ... different kind of chairs.Boss chair: 60mm, 80mmOffice Chair: 100mm, 120mm, 140mm, 160mmBar Chair: 180mm, 200mm, 260mm, ... Gas Spring is a manufacture in this office chair accessories line, we have been in production ...