Aurum Cables B Wire Connectors Pack of 100 for Low Voltage Wire Insulation piercing internal teeth connectors pack of 100 pcs Easy to squeeze soft metal crimp and Insulation piercing internal teeth. Great to splice phone wire or alarm wire fits 18 to 30 gauge wire solid or stranded. Built-in Test Point and Durable protective outer covering. Low voltage applications with Handy Zip Lock Bags.