Heat shrink butt connectors are high performance wire splicing connectors that are made in the USA and are designed for environmentally harsh conditions such as outdoor or wet areas. These butt connectors can be crimped using the insulated crimp nest on any ordinary pair of wire crimpers. Be sure to use the correct color coded nest to ensure the best crimp on your splice. Heat shrink insulation protects against corrosion and moisture, and add in the adhesive inner lining that flows with heat and makes the splice waterproof and environmentally sealed. Excellent splicing connector for marine, automotive, and outdoor use. Heat shrink insulation is color coded to the wire gauge sizes that each splice works with. Currently available for wire sizes from 22 gauge down to 10 gauge. Maximum voltage rating of 600 volts, so these connectors work well for both 12 volt and 24 volt splicing, as well as 120 volt and 240 volt. When you want the best splice connector for your application, use a heat shrink insulated butt connector. Temperature rating up to 221°F (105°C). Manufactured in the U.S.A.