1.Gas Spring,Lift,Cylinder,Strut for Chair,Table 2.Black ,chrome Surface 3.SGS BIFMA 4.ISO9001 Certificate ... /gas lift/gas cylinder/gas strutUse Used for boss chair/ office chair/bar chair etc.Quality NANT Gas Spring have good reputation by ... for different kind of chairs. Boss chair: 60mm, 80mm Office Chair: 100mm, 120mm, 140mm, 160mm Bar Chair: 180mm, 200mm, 260mm, 330mmSample Free.Color ...