Zareba IW5XNY-Z Wood Post Fence Insulaor, YellowHighlights: Color: Yellow Use for extending wire 5" from wooden posts Fastens electrified wire to wooden posts without losing energy through the post Extends the wire 5 from the wooden post For 9 gauge through 22 gauge high tensile steel wire and aluminum wire, all polywire (both regular and heavy duty), and polyrope up to in diameter Includes nails Packed 25 per bag