Weifang 100Tong Casting Co.,Ltd. founded on 2002. It is the one of the leading producer of grooved fitting in China. There are more than 500 skillful workers in the factory, and annual production value has exceeded 20 million yuan. There are five workshops: Auto-casting workshop, Hand molding casting workshop,Machining workshop,Painting workshop,Moulding workshop. We have independent intellectual property rights of the new Intelligent Instrumentation and attained many items of national patents. The company has the institute of the valves and grooved fittings. We have many leading current achievements in the industry.100TONG has passed ISO 9001 QUALITY SYSTEM and the grooved fittings have been approved by FM/UL....More information, plaease click the website: http://www.100t.cc/