Well Seal: Dial:2", 3", 4", 5", 6", 8" 1)equivalent to Standard 2)forged by cast iron; 3)with thermal refining treatment ... ; Well Seal:(1)Dial:2", 3", 4", 5", ... 6", 8"(2)equivalent to Standard(3)forged by cast ... quote you our best price asap. Well Seal 2''