TRAILER HITCH FOR BICYCLE CONNECTOR 1. Made of good quality aluminum alloy, durable and sturdy, equipped with accurate welding technology, can withstand heavy loads. 2. Equipped with a connecting pin, it is almost impossible to open, also after installing them, they will not fall off easily, which can ensure the safety of your child. 3. Easy to assemble, all you have to do is attach them with a nut to your bike, insert the trailer attachment, attach the pin. 4. The bicycle trailer coupling is a part that you can connect the trailer to your bike, allowing you to transport your little ones safely and comfortably. 5. This bicycle trailer coupling hitch is suitable for children's trailers and most bicycles. Specification: Item Type: Bicycle Trailer Coupler Material: Aluminum Alloy Bicycle mounting hole with rear axle diameter: Approx. mm / 0.4 inch Trailer Fixed hole diameter: Approx. mm / 0.3 inch Constant diameter recessed screw nut: Approx. mm / 0.8 inch Base plate length: Approx. 55mm/2.2in Application: for children's trailers and most bicycles List of packages: 1 x Connect Pin 1 x connector Note: 1. 2.