We are CO-WORKING DEVELOPING CO., LTD, we are from Tianjin, China. Our main business scope is steel products, such as pipes, pipe fittings and flanges, valves and so on. We also can supply equipments for oil field, and machines for welding and cutting. We have three factories, one is located in Hebei Province, one is located in ShanDong Province, and the other is in Tianjin.

Moreover, we have good and long term relationship with our suppliers in China...