Spin on o-ring, now I'm confused

[Joe Merone <jmerone@rocketmail.com>]

Ok guys now I'm confused.  With the SPIN ON oil filter
adapter just how many gaskets, o-rings, or whatever
you call them are there supposed to be in there?  

For the past 15 years there's only been one rubber one
- about 2 inches in diameter that seals the center
circle of the unit to where it meets the engine block.
 The old canister filter system had a larger gasket
that sealed the thin outside ring of the canister into
the slot on the block.  

Joe 
CF18928U