The ELK-9002 "Yellow Jackets" 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. 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. The ELK-9002 package contains 2 Ziploc bags of 250 connectors together with a reusable poly storage box.