Feature:1. Waterproof, Dustproof, Oilproof: Made of good quality ABS plastic material, waterproof, dustproof, oilproof, etc.2. Prevent Loosening and Falling: Trailer coupling guard sits firmly on the ball head, with a screw knob to prevent loosening and falling3. Replacing Old Cover: Tow bar ball cap works for replacing your old trailer coupling cover, very practical4. Protective Cover: Trailer hitch ball protective cover is applicable to trucks, semi trailers, cars, ships, etc.5. Long Service Life: Tow bar ball cap come with stable structure, excellent performance and long service lifeSpecification:Item Type: Tow Bar Ball CapApplication: Trailer hitch ball protective cover for trucks, semi trailers, cars, ships, etc..Package List:1 x Tow Bar Ball Cap