Durable Material: This bike trailer hitch is made of high-quality stainless steel, strong and durable. Features: Bicycle cup mount bike trailer hitch, easy to use, a necessary bicycle tool, compact, lightweight, suitable for carrying around. Easy to Use: The trailer hitch is easy to use; slide the ball into the cup mount and lock the pin in place. Bicycle Tool: Ideal for transporting kids or pets, allowing you to enjoy quality time with your family. Size: The mount hitch cup size is 3.9cm x 3.3cm x 6.5cm / 1.54 inch x 1.30 inch x 2.56 inch. Specification: Material: Stainless Steel Size: 3.9cm x 3.3cm x 6.5cm / 1.54 inch x 1.30 inch x 2.56 inch Package Includes: 1 x Bike Trailer Hitch Note: Please allow slight variations due to manual measurement and screen display differences.