1.Gas Spring,Lift,Cylinder,Strut for Chair,Table 2.Black ,chrome Surface 3.SGS BIFMA 4.ISO9001 Certificate 5.OEM Service Products NameGas spring/gas lift/gas cylinder/gas strutUseUsed for boss chair/ office chair/bar chair etc.QualityNANT Gas Spring have good reputation all over the world by high quality and good service. 5 year warranty for the goods.TypeStroke for different kind of chairs.Boss ...