These premium quality "B" Connectors are manufactured from the finest materials. They feature insulation piercing internal teeth, soft brass (easy to squeeze) crimp, a durable protective outer covering and contain a corrosion resistant silicone gel filling. These wire splices have been used in the telecommunications industry for many years. They provide a solid dependable splice in wires ranging from 18 to 30 gauge. package contains a zip lock bag of 250 connectors.