Quick Coupling: 1) Type: A, B, C, D, E, F, DC, and DP; 2) Size: 1/2", 3/4", 1", ... ", 3", 4",5"&6 brass quick Couplings are used in a wide variety of applications for petroleum handling, chemical processing, dry ... , and water, etc. 1) Material: brass 2) Type: A, B, C, D, E, F, DC, and DP.3) Size: 1/2", 3/4 ...