Tube fittings are available in a wide variety of materials and configurations in sizes from 1/16" to 2" and 2-50 mm. These two-ferrule tube fittings provide consistent leak tight connections in thousands of diverse applications. The two-ferrule mechanical grip design allows the front ferrule to seal while the back ferrule grips. Because the design uses consistent geometry instead of torque for gaugeable make-up, the fittings can be used on a range of thick- or thin-walled, hard or soft tubing, while resisting the effects of pressure and thermal cycling. Swagelok 31500 Aurora Rd. Solon, OH, 44139