... 2.Size: customized 3.Low cost. Back to Back c channel1)Standard: 41*41, 41*21,41x62,41x82...2)back to back: 41x41,41x62,41x82..3) ... factory,advanced facilities with experienced engineers.>Professional sales team and the best after-sale service provider in China.>Products are ... widely used in the world.Vendor to companies like ABB,Cooper etc. Our company is ...