Parts Master 8896 Power Steering Gear Rebuild Kit

The Big part of the job is removing and re-installing the gear box , the avertisement shows four of the Blue Teflon " 0 " rings , the pistonrequires four. But the Kit that I received had three in the package ~Other than that the rebuild kit is / was satisfactory. But once that I think about it, it was my fault I should have known that four wasrequired ~ ~ b ~