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Wirefy heat shrink connectors turn any electrical wiring job into a fast and highly efficient process. Simply crimp your terminal and apply heat. Professional grade electrical connections can be made in seconds. Unlike their vinyl and nylon counterparts, these wire crimp connectors seal the wire from harsh marine and automotive environments. Heat activated adhesive grants additional protection against strain and vibration. Features: Thick copper barrels for strong crimpsAll connectors are easy to crimp and will not splitPure copper terminals for maximum current flowHeat activated adhesive inside the heat shrink tubingLow temperature heat shrink tubing recovery ensures no wire damageConvenient storage case for quick access Benefits: Increased current flowLess voltage dropSuper strong wire grip Seals terminal ends from the elementsProtects connection against corrosionProvides great tensile strengthResistant to stretch and vibration Dual wall design for maximum protection3:1 Heat shrink ratioTranslucent tubing allows to inspect your connectionsColor-coded: easy to pick the right connector size