IDEAL Electrical WireTwist Wire Connectors deliver the perfect balance of performance, durability, and value for everyday electrical wiring projects. Designed with professionals and DIY electricians in mind, these wire connectors feature a positive grip shell that ensures fast, effortless installation while reducing hand fatigue. The shell is built from UL 94V-2 flame-retardant material, adding an extra layer of safety and reliability in residential, commercial, and industrial applications.Inside, a fixed square-wire spring provides consistent, secure connections that hold wires tightly in place, minimizing the risk of loose connections and electrical failures. The deep skirt design further enhances protection by helping guard against flash-over, making these connectors a safe choice for demanding jobs.Engineered to handle a wide range of wire combinations, this 300-piece jar contains a variety of connectors that are compatible with the following wires:WT2 (Blue) - 3 #20 AWG to 3 #16 AWGWT3 (Orange) - 2 #18 AWG to 2 #14 AWGWT4 (Yellow) - 3 #20 AWG to 2 #12 AWGWT6 (Red) - 2 #14 AWG to 4 #12 AWGWhether you are working on lighting fixtures, outlets, switches, or small appliance installations, IDEAL Electrical WireTwist Wire Connectors provide the secure hold and dependable performance you need.