SS-12-DELU-12 - Stainless 3/4" CBC Tube x 3/4" CBC Tube Union ElbowTylok SS 12 DELU 12 Stainless 3 4" CBC Tube x 3 4" CBC Tube Union Elbow CBC Lok Tube Fittings are comprised of four components: Body, Front Ferrule, Rear Ferrule & Nut. A leak proof seal is obtained through proper ferrule action as the ferrules are tightened onto the tubing via axial thrust provided by the nut. The front ferrule provides the leak proof seal, when the nut & ferrules are properly drawn up the specified number of turns. The rear ferrule