Blue polyethylene and metal insulated staples are an excellent choice for securing and protecting 14/2 and 12/2 non-metallic BX, MC, AC and UF cable. Metal construction for durability and the polyethylene insulator helps protect cables and prevent arc faults. Ideal for securing and protecting 14/2 and 12/2 non-metallic BX, MC, AC and UF cable Insulator made from durable polyethylene to protect cables and help prevent arc faults Metal construction Install with low-volt staple gun #msg-301 1/2 in. width 15 pack - 5 PACK