Round post insulator  Western Screw Tight Round Post Insulator for Sucker Rods or fiberglass rods. 

 Fits 1/4" to 7/8" dia round posts. Holds wire, polywire, polyrope and polytape up to 1 1/2"
Bag of 100. Color: White.

Check out our installation info online or call us 7 days a week for guidance!