Screw on insulator
Material: metal, plastic.
Total length: 3.7inch.
Metal part Total length: 2.34inch.
Self-tapping screws length:1.8inch.
New Combination material: PP+PE Material(More Durable: Heat-resistant, Anti-freeze, Unbreakable! )better than others cheap PVC, excellent resistance to high and low temperature.
Hard embedded head, can be screwed in with one hand.