1.It can protect the wires and cables in it effectively. 2.It can provide a safety environment for the workers. SpecificationInside Diameter Outside Diameter BendingRadiusPitch (mm)Non-supportlengthTypeLX56.656*25084*290150,200250,300350,400824Bridge type ,Both lids can be opened, Two-way gyration, With sliding , Huang buckle.