Sharp-edged T-post tops can injure your horses and livestock, causing pain to the animals and expensive veterinary bills for you. The Zareba(R) T-Post Top Insulator protects animals from the sharp-edged T-post tops. They fit 1.25 and 1.33 T-posts and accommodate any gauge wire, too! These white electric fence insulators are packed 10 per bag. | ZEREBA T-Post Cap