Copper battery cable ends are of conductivity for maximum current flow, and tin plating to prevent . Safe and reliable battery cable lugs and shrink tubing kit great used in solar panels ,marine, electrical industry ,golf carts,automobiles, home appliance and power distribution cabinets. Terminal wire ring connectors with a heavy duty construction for high temperature durability, it has excellent forming characteristics, good welding and electrical conductivity.and it allows for maximum strength when crimped. Name:Battery Cable Ends Shrinkage ratio: 2: 1 Colour:Photo Color Material:copper Package Contents: 64 x Battery Cable Lugs Ends 66 x Heat Shrink Tubing 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.