Durable Material: This Bike Trailer Hitch is made of 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: Enjoy the joy and excitement of transporting your kids or pets around with your bikes. you can spend a wonderful family time!Size: The mount hitch cup size is 3.9cmx3.3cmx6.5cm/1.54inchx1.30inchx2.56inch.Specification:Material: Stainless SteelSize Chart:3.9cmx3.3cmx6.5cm/1.54inchx1.30inchx2.56inchPackage Includes:1 Bike Trailer HitchNote:Please allow slightly errors due to manual measurement and different monitors.