You usually get the piston with seal, separate moving seal, front spring, residual valve and maybe the rubber boot. It is also nice if you get a new top filler gasket and the line fitting copper ring. I wouldn't buy anything until you see where it is leaking.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!