Superior gearbox M0008 shaft seal. New. Sold individually. Shipping combined on multiple item purchase. Don't let a bad seal ruin your gearbox, the gearbox is like $1000 to replace. Keep the dirt out and the lube in. I personally own a 72" deck, from my understanding the 60" deck used the same gearbox. I would recommend replacing them both, I had to split the gearbox to replace them, they are in a recessed groove not just pushed in from the outside.  Thanks for looking