The Dare Snug T-Post Insulator 2" will fit 1.25 and 1.33 lb/ft T-posts. Features a large flange which prevents arcing. Simply snap this extra length insulator on and around the post needed. Comes molded of high density polyethylene with carbon black for superior UV resistance. Solid wire holders take heavy barbed, electric fence wire and polywire. Comes in a pack of 25.