In this kit,we offer 12pcs 1/0awg heavy-duty lugs with a 3/8 screw size ring,corresponding matching 3:1 red and black heat shrinkable tube. | The ring terminal connector made of high-quality copper content of 99.95%,good electrical conductivity,conform to UL486 standard.The 3:1 shrink tube is well made of high quality environmental material,thick and durable. | The wire lugs connector can be easily crimped or soldered,the heat shrink fit solid or stranded gauge wire,heat shrink provides tight and full seal,prevents leakage of any solder. | The ring terminal connector application areas:military/aerospace,household appliances,lighting electronics,automotive electronics,new energy,the 3:1 adhesive-lined heat shrinkable tubing black and red,can be applied in industry,environmental protection material. | If you receive a defective product or have any problems with the product,please feel free to contact us,We will provide you with satisfactory service at any time.