I purchased the RAM Tough Track recently and it seems to be a very good product for the price point of only $66.49. I also purchased RAM Tough Track Ball, B size, with T-Bolt attachment and the RAM Tough Ball with washer.
Here are the part numbers;
RAM Tough Track RAM-DT-207-TRUCK-EXA-29BU
RAM Tough Ball with lock washer RAP-B379U-252050-SLW
RAM Track Ball with T-Bolt attachment RAP-B-354U-TRA1
*all the ball mounts are "B" size which is one inch*
Here are the part numbers;
RAM Tough Track RAM-DT-207-TRUCK-EXA-29BU
RAM Tough Ball with lock washer RAP-B379U-252050-SLW
RAM Track Ball with T-Bolt attachment RAP-B-354U-TRA1
*all the ball mounts are "B" size which is one inch*