... class 4 gas lift,it has passed TUV,SGS,LGA test.The quality of the gas lift is high. This ... is our class 4 gas lift,it has passed TUV,SGS, ... high.We mainly export this kind of gas lift to Europe countries.Describe: Stroke:60mm---120mmCertificate:TUV,SGS,LGAThe ... thickness of the inside of the gas lift(28pipe):2.5mmThe thickness of the outside of the ...