Reese Towpower Interlock® Trailer Hitch Ball Mount Security Kit, Fits 2 in. Receiver, 2 in. Drop, 0.75 in. Rise, 6,000 lbs. Capacity, Includes 2 in. Trailer Hitch Ball and Bent Pin Receiver
Reese 3500-lb 2-in Trailer Hitch Ball in the Trailer Hitch Balls department at Lowes.com
Reese Towpower 1-1/4 in. x 2-3/4 in. Shank 14K lb. Capacity Hitch Ball, 2-5/16 in. Ball Diameter, Chrome at Tractor Supply Co.
Reese 63836 Class V Hitch Ball, Chrome - 2-5/16" Ball x 1-1/4" x 2-3/4", 14,000 lbs. - Walmart.com
REESE Towpower 2-Ball Hitch Bar Ball Mount
Reese 2-in x 1-in x 2-in Interlock Hitch Ball at Lowes.com