Perfect Vision PVFTBKOSB Single Feed Thru Coax Wall Bushing with Knockout Black (Bag of 100) Dress up drilled holes for RG-6 coax wire entry. UV protected black plastic Center passageway accommodates up to 0.30 O.D. coax Accommodates most RG-6 dual-shield, Tri-shield and Quad-shield coax configurations. Keeps out drafts and reduces insect travel options. Bag of 100