Heat shrink butt connector splices for 16-14 gauge wire. Excellent wire splice for outdoor, automotive, and marine use. Durable blue heat shrinkable insulation provides outstanding abrasion resistance, and the heat activated inner adhesive will completely seal out moisture, debris, and chemicals from your 16 gauge and 14 gauge wires. Made right here in the USA, these butt connectors show their quality with around 20% more copper than cheaper made imported connectors. Recomended for critical wire splicing, where failure is not an option, or simply when you want to use the best for your project. Blue eat shrink tubing has a 3 to 1 shrink ratio. With a voltage rating of up to 600 volts, these heat shrink butt connectors can be used in both 12 and 24 volts systems, and 120/240 volt systems. For use in temperatures up to 221°F (105°C). Made in America.