Function: made of ABS plastic, waterproof, dustproof, oil proof, etc. Application: Protective cover for trailer hitch ball for trucks, semi-trailers, cars, ships, etc. Firm: Our trailer hitch guard sits firmly on the ball head, with a screw-in knob to prevent loosening and falling. Replace: Replace your old trailer hitch cover now. Package includes: 1 x trailer hitch ball cover. Color: Black Universal trailer hitch ball cover, for 50 mm (2 " " inch) ball head hitch Hitch ball cover Hitch ball protection cap with screw button Car accessories Functionality: Function: waterproof, dustproof, oil proof, etc. Application: Protective cover for trailer hitch ball for trucks, semi-trailers, cars, ships, etc. Firm: optimally adapts to the shape of your trailer hitch and has no leeway. Our trailer hitch guard sits firmly on the ball head, with a screw-in knob to prevent loosening and falling. Replace: Replace your old trailer hitch cover now. Specification: Product material: ABS plastic Inside diameter: 50 mm / 1.97 inch Product color: Black Warning: Please make sure the size of your tow ball. The size of this product is suitable for a 50mm tow ball. The package includes: 1 x trailer hitch ball cover.