Coupling M22 for Earth Rod D-20mm

Coupling M22 Features: Coupling made from high strength copper alloy, can protect the ground rod thread into the underground without damage and slow down the corrosion. Used for connecting rod and rod, rod and driving head. According to the need can increase the length of the rod. Connection is threaded, screw type M22. For use in grounding and lightning systems. Specifications: Material: brass. Rod diameter: 20mm. Screw type: M18. Length: 68mm. Outer diameter: 26mm. Weight: 150g.