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 - 21.91 x 9.57 x 13.2 in.. Item weight - 1.3 lbs.