... , high-quality, fast delivery, good service Products NameGas spring/gas lift/gas cylinder/gas strutUseUsed for chair/ office chair/bar chair etc.QualityLX ... samples from our factory.If you have your own size gas spring, welcome you send us your samples, we can make ... of medium tube & outer tube.Class 1---1.2mm, cheaper price, two year warranty(Normal)Class 2---1.5mm, cheaper price, three year warranty ...