Features . For fastening electrified wire to posts.. Extender t-post insulators allow you to fasten electrified wire to the post without losing energy through the post.. Fits securely on standard 1.25 or 1.33 studded t-posts.. One molded piece; needs no hardware.. Color - Yellow.. Bag of 25.. Dimension - 28.03 x 10.35 x 18.87 in.. Item weight - 2.08 lbs.