Reese Towpower 2-5/16-in Interlock Hitch Ball in the Trailer Hitch Balls department at Lowes.com
Truck Hitch Ball by Curt 2 inch x 3/4 inch Ball Long Shank
Hyper Tough Automotive 4 inch Starter Kit with 2 inch Hitch Ball - Walmart.com
Amazon.com: CURT 45042 Trailer Hitch Mount with 2-5/16-Inch Ball & Pin, Fits 2-Inch Receiver, 7,500 lbs, 4-Inch Drop , Black : Automotive
Trailer Hitch Ball Mount with 2-Inch Trailer Ball Hitch Pin TrekPower – trekpower
Curt Class 4 Ball Mount (2" Shank - 10,000 lbs. - 6" Drop - 9-3/8" Long) - 45336 - SharpTruck.com
Trailer Valet Blackout Series 8,000 lbs/10,000 lbs Capacity Adjustable Drop Hitch, 2 -in and 2-5/16 -in Ball- 0-4 -in Drop in the Trailer Hitch Ball Mounts department at Lowes.com