This is a RE-Manufactured PTO Valve housing for units in IH tractors 706 through 1486.This housing is for PTO units with spring activated anti creep brake pistons.The core price is included in the purchse price. The core charge of $30.00 will be refunded to your account when I receive the core. I also have many other PTO parts available. Check out my store for other IH parts. I have over 25 yrs. experience of rebuilding IH tractor and motors and have many parts available . Email your questions and I can probably help you..