Car Battery Insulation Cover: 20 pieces in total, made of heat insulating flexible rubber material, designed as angled cover tubes. Includes 10x red car battery covers and 10x black car battery covers. Angle Protective Insulated Connector Cover: For terminal dia up to 20 mm, dia is 12mm, product size: 20x12mm. Function: Slide over the battery cable and cover the battery terminal to prevent accidental short circuits and corrosion of the connections, protecting your vehicle, electronic and electrical systems (starter, alternator, etc.). Widely Use: Suit for car, truck, SUV, boats, motorcycle, ATV, scooter, generator, snowmobile, commercial, industrial, backup power, agriculture, and many other battery and battery cable applications. High Quality: Rustproof, high tensile strength and sturdy, can be used for a long time. Specification: Material: PVC Size Chart: 43mm/1.69inch Package Includes: 20 Piece Battery Terminal Boots Insulating Cover Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!