... gas-tight sealing and tube-gripping action Gas Fitting,lab equipment,lab furnitureDesign is standard on all 1/4 to 1 ... /2 in. and 6 to 12mm stainless steel tube fittings to help installers make more consistent, leak-tight tube ... metallurgical, and mechanical uniformity that allow predictable, repeatable installation.Tube fittings are available in a variety of materials, including controlled-chemistry ...