Schedule 40 seamless nipples – list x 1.75. Standard stocking sizes include 1/8” – 2”, close thru 6” lengths. Schedule 40 welded nipples are also available in 6” & 8” diameters. 1/8” thru 1” inclusive - packed 25/carton. 1 1/4”, 1 1/2” and 2” diameters - packed 10/carton. 2 1/2”, 3”, 3 1/2” and 4” inclusive packed/order.