Gasket, rubber ( 541-213 new PN 71931 ) used for all Erie 541 and 542 Adapter Nuts.
Normally you should order Two.
One for each Adapter Nut connection.
Note: Adapter Kits already include two of this part.
See alternate photos for exact measurements.
NOTE: Older gaskets had a smaller Inner Diameter, but it is only the Outer Diameter that matters when sealing the connection.