Description This item is a pack of 50pcs wire connectors in 0.5 to 1.0 mm², which is made of durable fireproof nylon and copper. This kit is great for wire connection in various occassions. Features - A very quick and reliable way of connecting additional cables to existing wiring in, for example fitting car alarms, radio-cassette units, etc. The cables to be joined are placed inside the snap-lock connector, the cover is pushed home with a pair of pliers and locks shut, thus completing the connection. - A simple and easy add extra wires onto difficult to reach wiring looms - Slide the connector over the existing cable add the new wire and squeeze with pliers,The metal cuts into the insulation of both wires and completes the connection - when soldering solutions are not suitable.PP plastic with tin plated brass terminal. - Package includes: Blue: AWG (American Wire Gauge) 14 -16 Red: AWG (American Wire Gauge) 16-22 Yellow: AWG (American Wire Gauge) 10-12 Safety insulator tap. Easy crimping with normal tool. Quick installation without striping wire job. These are a quick and reliable way of connecting cable & wire. Slide the connector over the existing cable add the new wire and squeeze with a pair of pliers then click the flap shut.