1It is easier to choose the correct heat shrink connector, and the different color?coded tubes with wire gauge markings, and can be easily identified. 2The outer layer of polyolefin tube and inner layer of hot melt adhesive provide excellent waterproof performance. The size of the polyolefin pipe is reduced, and the adhesive will flow inside the insulating material when heated. 3The thick barrel ensures firm and reliable crimping every time to prevent wire failure, increase current, reduce voltage drop and reduce equipment downtime. The wire never slips out of the connector. 4The seamless copper tube design provides high tensile strength and extreme stretch and resistance to mechanical damage. The translucent heat?shrinkable tube eliminates the tube opening problem, and high elasticity maintains stable performance. 5Can be used to connect internal wiring. Can be used on cars, moped, quad bike, tricycle, caravan, motorcycles, ATVs, scooters, boat, snowmobile etc.