I have been using a drop style ball hitch for the 16' trailer, but it was only rated for 5000 lbs. Trailer is 7000 lb max. So I have been looking for something better and found this.
GTW/TW Ball 1 7,500 LB/750 LB
GTW/TW Ball 2 10,000 LB/1,000 LB
Length 8 1/2 IN
Shank Type Solid Receiver
Tube Size 2 IN
Finish Black Powder Coat
It is rated at 7500/750 lbs on the 2" ball, 10,000/1000 on the 2-5/16 side. The 2X2 is solid steel. Found it at the local farm supply for $59. It also is about 2" shorter from my old mount height, so the trailer will not be so high in front when empty.