The Zareba Yellow Nail-On 5in. Extender Insulator extends the wire five-inch from the wooden post. It can be used with all gauges of wire. This yellow insulator is packed 25 per bag and includes nails.

Zareba Yellow 25-Pack Nail-On 5" Extender Insulator: For 9 gauge through 22 gauge high-tensile steel wire and aluminum wire, all polywire (both regular and heavy duty), and polyrope up to .25" in diameter Extends the wire 5" from the wooden post Fastens electrified wire to wooden posts without losing energy through the post 25 insulators per bag (Yellow)