... , F, DC, and DP; 2) Size: 1/2", 3/4", 1", 1-1/4",1-1/2",1-3/4", 2", 2-1/2", 3", 4",5 ... , etc. 1) Material: brass 2) Type: A, B, C, D, E, F, DC, and DP.3) Size: 1/2", 3/4", 1”, 1 ... -1/4",1-1/2",1-3/4",2",2-1/2",3",4" ,5 ... ) Precisely machined for accurate fit, join fast and save effort. (2)Recess holds gasket firmly in place assuring proper placement. (3 ...