This standard specifies the requirements for the design, materials, manufacture and testing for : Type A - swivel ferrules of 1/2’' (15mm), 3/4” (20mm), 1” (25mm), 1 1/4” (32mm), 1 1/2” (40mm) and 2” (50mm), Type B - vertical ferules of 1/2” (15mm), 3/4” (20mm), 1” (25mm).