All plastic insulator that will accommodate T-posts ranging from 1.25 Lb./Ft. to 1.33 Lb./Ft. Extends wire 1 In. Features an unbreakable snap-on fastener attachment. Made of polyethylene plastic, unbreakable, immune to weather, freezing and hot sun. Nonporous, dries off quickly. 25 insulators per bag. Yellow in color.