These heat shrink butt connectors are designed to deliver strong, reliable, and weather-resistant electrical connections. Each connector features a tinned copper barrel that ensures maximum conductivity and corrosion resistance, while the heat-activated adhesive lining creates a permanent seal against moisture, dirt, and salt. The transparent yellow heat shrink tubing allows easy inspection of the crimped connection and shrinks tightly to the wire for a secure hold. Built for 12-10 gauge wiring, these connectors are ideal for repairs, splicing, or new installations where durability and long-term performance are required. Once crimped and heated, the dual-wall design provides both mechanical strength and environmental protection, ensuring connections remain tight even in harsh automotive, marine, or industrial settings. Packaged in a convenient 100-count box, these butt connectors provide a dependable solution for maintaining safe, efficient, and lasting electrical systems.