[Premium Quality]: Heavy-gauge brass in the wire connector ensures a strong, secure crimp every time, providing small voltage drop, high current, and less heat. These will prevent shorts and problematic wiring that poor quality connectors are notorious for [DURABILITY]: Each terminal in the electrical connector kit is made from heavy gauge tin plated brass to resist corrosion and hold the wire in place when crimped. [Color and Size]: The assortment of connectors includes red (AWG 22, AWG 21, AWG 20, AWG 19, AWG 18, AWG 17, AWG 16), blue (AWG 16, AWG 15, AWG 14) and yellow (AWG 12, AWG 11, AWG 10) nylon spade connectors for 22 to 10 AWG wire. Red, blue and yellow indicate different sizes of electrical connectors for easy identification when in use. [WIDE APPLICATIONS]: Compliant with all electrical standards, perfect for home and automotive applications, whether you're working on a vehicle, home or science project, our quick-connect wire connectors will ensure everything is connected correctly