Item Type: Tow Bar Ball Cap Application: Trailer hitch ball protective cover for trucks, semi trailers, cars, ships, etc. 1Waterproof, Dustproof, Oilproof: Made of good quality ABS plastic material, waterproof, dustproof, oilproof, etc. 2Prevent Loosening and Falling: Trailer coupling guard sits firmly on the ball head, with a screw knob to prevent loosening and falling 3Replacing Old Cover: Tow bar ball cap works for replacing your old trailer coupling cover, very practical 4Protective Cover: Trailer hitch ball protective cover is applicable to trucks, semi trailers, cars, ships, etc. 5Long Service Life: Tow bar ball cap come with stable structure, excellent performance and long service life1 x Tow Bar Ball Cap