The spares on my boat (from the po) are Napa Gold. Not at the boat, so don't know the numbers. I used two of them last season, seem to be fine. Came with rings. Be careful putting it all back together, I don't have good access because the genny is in the way and one of the top rings didn't seat well. Caused a small messy smelly leak. Oh well, that side of the engine needed a good cleaning anyway.....