The Polymer crossarm insulators are suitable for using in metropolitan area network and can effectively use city narrow corridor area of booster transmission. Especially composite cross arm insulator can decrease the height of tower, save a lot of financial and material resources.

Due to its high bending strength, can prevent the porcelain cross arm insulator prone to fracture accident, and dirt resistant performance is good. Polymer crossarm insulator can replace porcelain cross arm insulator.