【What You Get:】 20 Pcs per pack of 2/0 Guage (AWG) 3/8" ring terminals, copper lugs closed end termination ring terminals with 20 Pcs 3:1 Dual Wall Adhesive Heat Shrink Tubing Tube for your work(10pcs Black and 10pcs Red). | 【Quality Material:】 The TKDMR bare copper battery cable ends are made from 100% annealed copper with special treatment surface for corrosion protection, providing a high degree of conductivity for maximum current flow. Can be Crimped or Soldered.The 3:1 shrink tube is well made of high quality material(UL & CSA certified for up to 600V,257℉）, thick and durable than 2:1 shrink tube. | 【Reliable and Easy to Use:】These battery lugs with heavy duty construction,improves high temperature durability and have a close end pad design, keeping electrical components, batteries and cables safe and free from moisture, and also prevents solder from leaking during installation; high standard flared opening for easy wire insertion.The wire shrink wraps are all pre-cut into the most common sizes which improve your work efficiency. | 【Wide Applications:】These Copper Lugs works with Heat Shrink Tubing which are safe and reliable , greating for distribution box, golf carts, solar panels, marine,home applications,Vehicle,Motorcycle,DIY Electrical Wirings and Other Outdoor Applications. | 【How to Choose and Use it?:】 Recommend to check product dimensions to ensure a proper fit.Freedom to choose from a variety of wire sizes, stud sizes & pack quantities, that fit your requirements and applications; Can be crimped or soldered; Audio wire may not be a direct fit.Use with a compatible copper cable.