Material and size Ring insulator head - Made of high-quality combination materials, the is smooth and thorn-free. This is cheaper than other PVC and has excellent high and low temperature resistance. Screw-in ring insulator - high-quality steel with anti-rust coating, self-tapping threads. Insulator Dimensions: Overall Length = 3.7 inches This electric fence insulating ring is a third generation product. Made of high quality materials. High strength, good insulation, no deformation, sunproof and rainproof. Eco-friendly and completely harmless to people, pets and wildlife. Electric fence ring insulator for wire, stranded wire, rope and electric fence tape, can be used as a start, end, corner or line insulator. This electric fence insulator chute accommodates wires without energy loss and is suitable for low impedance and standard load fence controllers. Material: PP+PE+metal colour: Black+silver Package Contents: 50 x insulator 1 x socket tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.