Edelbrock heads seals

The white seals are Teflon.
The heads didn’t leave the Edelbrock facility with those.
(Let’s call it “extremely unlikely”)

They were pretty commonly used 20+ years ago when installing dual springs, since they have a smaller OD, and provide more clearance.

Nowadays, the popular seals are the ones PBR showed.
They also provide good clearance to the springs, and seem to hold up much better than the Teflon ones.

If they fit with adequate clearance to the springs, the “ring and band” style that come on the Ede heads(like what you bought) have always worked well for me.