Description: Name: Tow Bar Ball Cover Material: Plastic Color: Black Shape: Oval (with hook) Size: 50MM Height: 70mm Application scope: trucks/trucks/semi trailers/cars/ships Function: Trailer tow ball protective cover to prevent grease and dirt  Features: Fitment: Height: 70mm. Simple push-pull traction ball cover, suitable for all standard 50mm traction balls. Helps to keep the tow ball free of dirt and rust. Premium Material: Made with plastic for maximum durability, anti-corrosion, wear resistance, has good performance and high stability. Function: When the trailer hitch ball is not attached to the trailer, use this hitch ball cover to protect your trailer hitch ball. Protect it from the harsh environment. Easy To Use: Just slip on the attached strap ring then open on the cover over the tow ball. The cap is just as simple to take off, with the strap keeping you from losing it. Customer Service: Our mission is providing the great customer service to satisfy our customers. Thus, if any issues regarding this product, please feel free to contact US.  Packing list: 1 x Trailer Ball Protective Cap  Note: 1. Due to manual measurement, please allow 1-3mm error. Make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.