1、The contacts are copper galvanized, not easy to oxidize, good conductivity and long service life. 2、Blue, red, yellow, different colors, convenient for marking different types of wiring. 3、All terminals and wire connectors are stored in a box for easy carrying. 4、Fast buckle, manual operation. 5、Make your wiring more convenient and flexible. Feature: The contacts are copper galvanized, not easy to oxidize, good conductivity and long service life. Blue, red, yellow, different colors, convenient for marking different types of wiring. All terminals and wire connectors are stored in a box for easy carrying. Fast buckle, manual operation. Make your wiring more convenient and flexible. Specification: Material: Plastic, Copper with Galvanized treatment Package list:(Optional) Package #1 20 *   Lock Wire Connectors+Male Terminal   22-18AWG(red)  ( 0.5- 1.0mm²) 20 *   Lock Wire Connectors+Male Terminal   18-14AWG(blue)  ( 0.75- 2.5mm²) 20 *   Lock Wire Connectors+Male Terminal    12AWG(yellow)    ( 4.0mm²） Package #2 80 *   Lock Wire Connectors+Male Terminal   22-18AWG(red)  ( 0.5- 1.0mm²) 80 *   Lock Wire Connectors+Male Terminal   18-14AWG(blue)  ( 0.75- 2.5mm²) 80 *   Lock Wire Connectors+Male Terminal    12AWG(yellow)    ( 4.0mm²) Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.