O-ring Sump Old Style Microline ( Made 1999 or before )
* Which O-ring? Old Style or New Style?
NEW O-RING = S3069
USED ON NEW SUMP = S702909
And measures 3" O.D. x 2 3/4" I.D. with 1/8" Width
OLD O-RING = SN1021
OLD STYLE USE WITH BLACK NUT = S7022
Measures 2 5/8" x 2 3/8" x 1/8"
If you have the large black nut, then you have "old".
If not, then you have one piece white sump that screws directly to the upper manifold and you would use the "new" o-rings.
*Why do the older ones cost more?
They are an obsolete item, and soon to be no longer available.