Thickened Tinned Copper Core – Our Heat Shrink Butt Connectors are made with tinned red copper (99.9% purity) and heat shrink tubing with adhesive, ensuring strong, secure crimping every time. The thick copper barrel provides minimal voltage drop, high current flow, and less heat, preventing short circuits and making your connection projects safer and more reliable.

Easy to Use – Simply strip the wire insulation and insert the wire into the shrink butt connectors. Crimp the copper barrel with a crimper to compress the two ends of the wire together and then heat with a hot air gun or small torch for a few seconds. No soldering kit is required. The transparent sleeve allows for precise inspection when stripping and inserting wires inside.

Waterproof & Flame-retardant – The insulation tubing features a unique dual-walled design. The adhesive-lined inside the 3:1 heat shrink connector exudes hot melt adhesive when evenly heated, shrinking quickly and adhering to wire insulation. This ensures a 360-degree secure seal and excellent waterproof properties. These insulated waterproof marine grade crimp terminals can be used underground.

Durability & Safety – The polyolefin heat shrink tubing provides high tensile strength and resistance to stretch, minimizing mechanical damage, so there’s no worry about rat chewing or similar physical damage issues. The thick tinned copper and seamless barrel design ensure strong and secure crimping all the time with no issues of wire coming off.

Great Value – The package includes 200PCS Blue heat shrink butt connectors, perfect for factories, enterprises, schools, or stores where butt terminals are frequently used. These connectors comply with CE, RoHS, ISO9001, and SGS standards. If for any reason you’re not satisfied with this deal, you’re covered by our 60-day NO-QUESTION-ASKED MONEY BACK guarantee.