This is a Remanufactured 12" Heavy Duty Clutch Pressure Plate for IH Farmall tractors 706,756,766,786,806,826,856,886,966,986,3088,3288 . Specify your tractor model and if it has hydraulic assist or not.Spring count and pressure will vary depending on if Hydraulic assist is used or not. Check out my store for other IH parts. I have over 25 yrs. experience of rebuilding IH tractors and motors and have many parts available . Email your questions and I can probably help you.