Heat shrink butt splice kit, 22-10 AWG. For harsh environments. Insulates and protects connections from wire pullout, moisture intrusion and abrasion. Constructed with heat shrink insulation, adhesive lined. Heat-activated adhesive melts and flows to waterproof and create a seal when crimped and heated. Resists salt water, oil, gasoline and other environmental contaminants. Compartmentalized case included.