Our tractor stalk rollers are designed for JD 8000 Series, 8R, 8RT, 8RX, and 9RX.  This unit bolts on between the frame and the weight bracket allowing you to take 8 bolts out at the end of the season to dismount the roller without taking weights off.  The independent rollers are free floating for the ability to take on rough terrain.  Unit is built of mainly 1/2 inch plate and heavier. It weighs approximately 1,500 lbs.