Zareba Systems Porcelain-Look IWSD-Z Self-Drilling Wood Post Insulator (25 Pack)， White<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>25 units per order</li><li>Large， durable， screw-in insulator for use with electric fencing</li><li>Can be used with steel wire， aluminum wire， polyrope， and polywire (not recommended for polytape)</li><li>Easily installs with a power tool in just 10 seconds</li><li>White with a porcelain look; as strong as steel， more durable than porcelain</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31Vtnar19XL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51VKn85GQ4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51g3b1Umw2L.jpg" noproxy>