50pcs Solder Seal Heat Shrink Butt Wire Connector Terminals CopperAn easy one step connection of wires, soldered, insulated and sealedCan be ideal use in marine and automobile applicationsPolyolefin tubing in outside and hot melt adhesive in insideSolder and seal and with advanced waterproof functionPolyolefin heat shrink butt connectors improved pullout strength, provides seal, strain relief, cable check, and insulation
