Dixon® Combination Nipple, Series: King™, 4 in Nominal, Grooved, 7-3/16 in Length, Carbon Steel, Unplated, 4-1/32 x 4-1/2 in dia Dixon® STV40 King™ Combination Nipple, 4 in x 7-3/16 in L Grooved, Carbon Steel, Unplated