CURT Pintle Hitch with 2-5/16 in. Trailer Ball, Fits 2-1/2 in.This CURT receiver mount ball and pintle hook is designed to insert into any 2 1 2 in. x 2 1 2 in. receiver tube. With a trailer ball capacity of 20,000 lbs., it offers a solid complement to any class 5 trailer hitch (note: Never exceed the ARB265Wt weight capacity of any towing component, i. e. the vehicle, hitch, trailer, etc.). The pintle hook fits any lunette ring with a 2 1 2 in. or 3 in. inside eye diameter, while the trailer ball can be coupled