VEVOR 3 Point 2 Inch Universal Trailer Hitch Heavy Duty Receiver Hitch Category 1 Tractor Attachments Tow Hitch with 5000lbs Towing Capacity Black

Top: 19mm. Bottom: 22mm.

Hello, it is recommended to install two long pins at the hook. The quick hook should be adjustable in width to match the product.

Yes, this receiver is compatible with quick hitch.

No, it can't be used with a dirtbike trailer.

It has a towing capacity of 5,000 pounds.

We do not sell parts separately. All our products have a 12 month warranty and if there is a problem with your purchase during the warranty period, we can send you a replacement part free of charge(In the case of parts that are not consumable). Please click the following link to contact us: https://www.vevor.com/pages/contact-us. If you need to purchase extra parts, we are sorry for this we do not sell them. They need to be purchased locally.