Safely & Efficiently: The flame retardant shell provides safety and insulation when wiring, pre-twisting wire is no Safely connect wires without soldering or electrical tape, no tools necessary. Cone shaped spring pull the wires into connector and on, spring insert a stable connection when working on wiring projects. Applications: The twist on electrical connectors are great for home theater, speaker wire, stere wiring, automotive, marine wiring projects, househould wiring projects, commercial or residential applications, etc. Five Color-Coded: Include five color-coded assortment of grey, , orange, yellow and red connectors, assorted size fits for most electrical wiring projects and applications, great addition to your electrical connector kit! Assortment Gauge: 250pcs Gray wire nuts, min 2x#22 max 2x#16, 250pcs wire but, min 2x#22 max 3x#16; 250pcs Orange wire nuts min 1x#18 and 1x#20 max 4x#16 and 1x#20; 90pcs Yellow wire nuts min 2x#18 max 4x#14 and 1x#18; 60pcs Red wire nuts min 2x#14 max 2x#10 and 2x#12 Easy to Sotrage: Our -on wire connector assortment packed into a divided storage box to keep the different wire connectors separately. Covenient to storage and use., Weight: 2.67310492675 pounds, Manufacturer: Kueohse