1.Made with heat shrink material, crimp with a true plated copper core. 2.When properly heated and shrunk, they provide a seal that is to water, steam, salt and other contaminants. 3.Heat shrink insulated connectors provide improved pullout strength and strain relief. 4.The translucent heat shrink material allows visual inspection of the connection, and included almost frequently-used connectors' size. 5.Excellent splice for marine, automotive, outdoor, or harsh, environment use. Shrinkage ratio 3:1.Moisture-proof and waterproof Excellent electrical conductivity Excellent tensile strength and resistance to mechanical damage Excellent puncture resistance to that the outer layer of the crimping is not damaged Type: Heat Shrink Butt Connectors Operating temperature range Operating temperature: -55-125 Start shrinking temperature: 80 Minimum complete shrinking temperature: 130 Warning:The product has choking hazard. The small parts shouldn't be seen by children under 3 years old. Colour:Yellow Material:PE+Copper Size:C:Yellow connector: Suits cable/ wire sizes 4.0-6.0mm 12-10 AWG Package Contents: 100 x Heat shrink terminal Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.