BATTERY CABLE ENDS: You get 150 pieces of copper terminals and heat shrinkable tube sets that meet copper wire connectors. This ring terminals contains 74 pieces of copper battery terminal connectors of 10 sizes, such as AWG2 4 6 8 10 12, and 76 pieces of heat shrinkable tube kits of 2 sizes, including 38 pieces of black and 38 pieces of red heat shrinkable tube sets. ENVIRONMENTAL PROTECTION: All 3:1 heat shrinkable tube kits are made of high-quality materials and are more . This kind of heat shrinkable tube is made of polyolefin material, which is non- and flame-retardant. They can all reach 600v and 257 degrees Fahrenheit, ensuring safety and reliability. This kind of heat shrinkable tube has good electrical insulation, sealing, resistance and high temperature resistance. PORTABLE PACKAGING DESIGN: 150pcs Battery cable lugs ring wire crimper and heat shrinkable tube kit of different sizes are neatly packed in a convenient and parent storage box.The label on the lid of the parent box indicates the size and storage location of different copper wire lugs and heat shrinkable tube sleeves. Each bare copper lug is engraved with its wire gauge logo to that you can quickly find the item you think of without worrying about the size mixed together. WIDELY USED: This kind of 4 gauge wire connectors is safe and reliable. They are suitable for cables, electrical boxes, boats, golf carts, homes, solar panels, and other applications. The heat shrinkable tube can be appropriately used in outdoor equipment such as motorcycles, vehicles, boats, DIY wires, etc. Please pay attention to choosing the right size wire connector and heat shrinkable tube. HIGH QUALITY AND SAFETY: The battery connectors are all made of 100% annealed electrolytic grade copper, which provides a of conductivity for the maximum current and has the greatest electrical conductivity. The of the battery terminal and battery cable ends is tinned and passivated to impr