NANTAI 140mm stroke chromed gas lifts for office chair
gas lift for swivel chairs,gas spring,gas lift for chairs,locking-type gas spring,types of springs,customized gas spring
1.Type
Class 2 ---Φ28 thickness is 1.5mm,Φ50 thickness is 1.0mm
Class 3---Φ28 thickness is 2.0mm,Φ50 thickness is 1.2mm
Class 4 ---Φ28 thickness is 2.5mm,Φ50 thickness is 1.5mm
2.Package
Poly Bag + Export Carton, Pallet if you need
3.Production Abality: 600,000 PCS/month
4.Certificate: SGS BIFMA X5.1,TUV DIN4550
Highlights:
·Reliable seal performance
·Defect rate of less than 3‰
·Smooth and noiseless stroke
·Reliable product quality 
http://www.ntgasspring.com/