1. Material: copper/Iron 2. Easy and convenient to use 3. Suitable for connecting internal wiring 4. Comes with an insulating sleeve for safe use and a plastic case for terminal storage 5. Suitable for batteries or rocker switches in appliances, cars, and audio systems for quick connection/disconnection 6. The male and female connectors come in three different sizes: 2.8mm/4.8mm/6.3mm, ideal for 22-14 gauge wire. Different sizes are available to meet your specific needs. 7. Package contents: - 2.8mm male terminal blocks x 40 - 2.8mm female terminal blocks x 40 - 2.8mm insulation sleeves x 40 - 4.8mm male terminal blocks x 40 - 4.8mm female terminal blocks x 40 - 4.8mm insulation sleeves x 40 - 3.6mm male terminal blocks x 40 - 3.6mm female connector x 40 - 3.6mm insulation sleeve x 40
