Feature●Fits both 1.25 and 1.33lb metal T posts. Can be nailed or screwed to round or square wood posts as well as vinyl posts.●Can be attached to a steel pipe/post with tie wire●Screws/nails not included.●25 per pack●Main color is BlackDescription This is a multi-purpose special 3 in 1 insulator that works on t posts, wood posts and some round posts. great for high tensile steel wire, insulated electric wire and will accept polywires and polyropes up to 3/8" (9.5mm) in diameter.