Mae yna lawer o dda blwch type substation factories in China, it is difficult to find the best one. If you are just in need of box type substations, pls stop wasting time on the looking for. SPL is just here able to supply good and cheap box type substations such as preinstalled substations and combined substations. Besides the lower price, SPL is also professional in global trade able to supply ease business and quick delivery.