... , including Spray Metal coupling, class T coupling, Sub OD coupling, with various spec. of Full size, Slim Hole, grand chamfer, Two ... -way camber,etc. With world top level equipments and technicians, the monthly production capacity is more ... COUPLING, API SPEC 11B STANDARD 7/8" SPRAY METAL COUPLING WITH BIG CHAMFER, SIZES ARE API 11B STANDARD 7/8" SPRAY ...