The polycarbonate insulators, designed for use with wooden posts and a variety of wire types - including steel wire, aluminum wire, poly rope and poly wire - can be utilized with both high-tensile and standard electric fencing.
They are fabricated to withstand harsh weather conditions, lasting the lifetime of the fence. Available in a box of 25, these new insulators mimic the look of porcelain with the strength of steel. 
—From Woodstream Corporation news release
