Fast and efficient way to join wires, and protect your connection against any elements! Wirefy heat shrink butt connectors turn any electrical wiring job into a fun and a highly efficient process. When heat is applied adhesive seals the wire ends making your connection waterproof. These crimp butt connectors will protect your wiring against strain and vibration. Unlike their vinyl and nylon counterparts, these butt connectors are able to stand up to the harsh marine and automotive environments. <br /><br />Wirefy heat shrink butt connectors will increase current flow, prevent wire failures, reduce equipment downtime, and ensure less voltage drop. Your wire will never slip out of these waterproof wire connectors. If you are working on your boat, auto, home, RV, trailer or motorcycle wiring project, these heat shrink butt terminals will help you create secure and durable connections every time. Try one and see for youself - have confidence in every electrical connection you make.<br /><br />Heat Shrink Butt Connector Advantages: <br />- Seamless copper barrels provide stronger wire grips <br />- Tinned cooper barrels ensure maximum current flow <br />- Butt connectors are easy to crimp and will not split <br />- Waterproof connection is ensured by heat activated adhesive inside the heat shrink tubing <br />- Heat shrink tubing recovers and forms a watertight seal <br />- No wire damage due to low temperature heat shrink tubing recovery (Recovery starts at 176°F) <br />- Wide range operating temperature (from -67°F to 257°F)  <br />- Convenient reusable case is included for easy access and storage <br />- Wire gauge imprint on connectors