Gallagher North America 210640 T-Post Topper Fence Insulator 10 Pack, white, heavy duty, T post Topper insulator, fits all T-posts, w insulator on top will accommodate any wire up to 3/8", locking front latch accommodates any tape up to 1 1/2" wire up to 3/8", 10 year warranty. Features 10 pack, White Fits all T-posts, w insulator on top Will accommodate any wire up to 3/8", Locking front latch Accommodates any tape up to 1 1/2" wire up to 3/8" USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.