Material: The battery terminal cover is made of high quality rubber material, flexible, soft, heat insulating, durable and with angle type smoking pipe. What You Get: There are a total of 20 terminal covers, including 10 red and 10 black. You can use red color to represent positive and black to represent negative, very practical. Size: This is an angle type protective insulating connector cover, suitable for battery terminals with a head diameter of 20mm/0.79inch and a tail diameter of 12mm/0.47inch. Protective Function: Protect insulating covers for battery terminals, the sleeve is easily worn after crimping the terminals, and these covers can prevent dust from entering the cable end. Wide Applications: They are ideal for cars, trucks, SUVs, boats, motorcycles, ATVs, backup power, commercial, agricultural, military applications as well as many other battery cable applications.