Product: the quantity of these screw insulators is enough to complete the wood post electric project for extended coverage and multiple fence lines, you can also connect Nice Material: the black electric wire fence insulator is mainly composed of non conductive plastic materials and screws; These black plastic engineering has high mechanical properties and insulation properties; Product Design: the outlet insulators are very strong claw design with smooth , high strength, , weatherproof and well insulated, can accommodate most types of fence wire; Nice arc protection reduces short circuits; The product has no odor and is corrosion resistant Product Dimensions: these black electric wire fence insulators are precisely sized, with uniform wall thickness, wire, rope; Allowing steel wire, multi strand steel wire, multi strand rope to run Wide Range of Applications: these black electric post insulators are suitable for low impedance and standard load gate controllers, fence insulators are mainly designed to prevent electrical short circuits between wires and fence posts, also can be nailed to wood posts for pet fences size: 8.5 x 3.9cm Material: plastic colour: Black Package Contents: 100 x Insulators 1 set screw 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.