Detailed description: Product Description: This wire connector assortment includes 5 different sizes from 22 to 12 AWG wires, sufficient to meet your daily wiring needs. They can help you connect wires without welding, strapping, and crimping, saving your time and improving work efficiency. Key Feature: Color-Code: There are 5 different colors of wire screw caps, each color corresponds to a size, easy to identify and choose, so you can quickly find the proper one when you are working. With Storage Box: We provide a plastic storage box to store all wire connectors, and protect them from dust and moisture, also convenient for carrying around. Specification: Product Name: Wire Screw Caps Material: ABS + metal Gray connectors (22-20 AWG): outer diameter: 8.6mm/0.34 in, inner diameter: 6.5mm/0.26 in Blue connectors (20-18 AWG): outer diameter: 9.9mm/0.39 in, inner diameter: 7.1mm/0.28 in Orange connectors (18-16 AWG): outer diameter: 12.7mm/0.5 in, inner diameter: 9.7mm/0.38 in Yellow connectors (14-16 AWG): outer diameter: 14mm/0.55 in, inner diameter: 11mm/0.43 in Red connectors (14-12 AWG): outer diameter: 16.3mm/0.64 in, inner diameter: 13mm/0.51 in Quantity: 460pcs Application: indoor and outdoor wiring projects Parts List: 30 x Red Wire Caps (14-12 AWG) 50 x Yellow Wire Caps (14-16 AWG) 80 x Orange Wire Caps (18-16 AWG) 150 x Blue Wire Caps (20-18 AWG) 150 x Grey Wire Caps (22-20 AWG) Note: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement. [Insulated Material] These wire connectors are made of premium ABS material, insulated and safe, which can avoid short circuits and reduce safety hazards caused by contacting the other wires or exposed metal surfaces [Spring Design] These wire screw caps adopt premium metal spring, which provides good electrical conductivity while ensuring a fast and stable connection to prevent falling apart. These connectors can be reused as long as the inside coil is not loose. [Multiple Sizes] You will get 30pcs 14-12 AWG wire screw caps, 50pcs 14-16 AWG wire screw caps, 80pcs 18-16 AWG wire screw caps, 150pcs 20-18 AWG wire screw caps, and 150pcs 22-20 AWG wire screw caps, sufficient quantities and different sizes to meet your different wire needs for a long time. [Quick Connection] Just prepare appropriate wire screw terminals, and then wrap the 2 peeled wires together, and finally insert the wire knob into the wire screw terminals. It only takes a few minutes to connect and disconnect, very convenient. [Wide Application] These wire screw caps can be used for indoor and outdoor wiring projects, such as house wiring, lamps, signal systems, home appliances, machinery, automobiles, etc. They are essential tools for electricians.