The T-Post Screw-On Insulator is made of high-density polyethylene resistant to UV and weather. The insulator can be opened for attachment anywhere on the post. No extra hardware is required. The screw-on threads allow for the insulator to be adjustable to the size of your post.

Fits all posts as described below:

• T posts, steel – small, medium & large, with or without studs.
• T posts, fiberglass – medium & large sizes only.
• Sucker rods – 3/4″ diameter only.
• U posts – small, 11/8″ wide. Backside only.
• Small garden U posts—11/8″ wide.