Features: Make of a flame retardant materials that prevents wire from contacting other wire or exposed metal surfaces, resulting in dangerously faults or short circuits. And the internal steel have better conductivity and better wire gripping performances, and will not fall down easily even under strong vibrations. Easy to Use: Insert the correct size wire into wire Caps and tighten it, without insulating tape, welding and pre-twisting wire. Our screw-on wire connector assortment packed into a divided storage box to keep the different wire connectors separately. Covenient to storage and use. They can be used for homes theater, speakers wire, automobile, ship wiring projects, home wiring projects, commercial or residential applications. Specifications: Materials: Plastic Size: As Shown in the Picture Package Includes: 60Pcs Gray 80Pcs Blue 52Pcs Orange 18Pcs Yellow 10Pcs Redness note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.