Shijiazhuang Sunny Trading Co., Ltd. is an export office and branch company of Ganma Pipe Industry & Technology Co., Ltd. , the factory was founded in 1991, covers an area of 106,700 square meters (about 160 acres). The company's registered capital is sixty million yuan.

Ferrule type pipe fittings are sealing pipe fittings suitable for non corrosive or corrosive media such as oil, water, and gas.

Rigid couplings are for grooved pipeline connection. At the joint part, the adjacent pipe ends are not allowed to have relative angular displacement and corresponding axial rotation.

The flexible couplings are used for grooved pipe connections, where adjacent pipe ends allow a certain amount of relative angular displacement and corresponding axial rotation.