Duct rodder is commonly used for cable and wire laying in the conduit. It makes the cable and wire to get through the conduit easily. The rod of duct rodder varies from 4.5 mm to 16 mm. The surface treatments are galvanization, painting and PVC coating. The common surface treatment is painting and it can suit most environment. 

Maybe you don't know how to choose the right diameter of the duct rodder. You can choose it as following methods: 

Choose a right size duct rodder according to conduit size:  

Choose a right size duct rodder according to environment: 

1) Painted frame is suitable for common environment. The color can be silver, black, red, blue, green and so on.

2) Galvanized duct rodder is suitable for rainy and corrosion environment. The color is silver.

3) PVC coated duct rodder can resist corrosion of acid , alkali and moisture. The color is black.

Choose a right size duct rodder according to strength and mini bending radius:

If you still don't know how to choose, please contact us. Email: anna@zhengnacn.com.