O-ring style water necks seal on a moulded rubber ring rather than a paper gasket, which is why they can be unbolted and refitted without scraping anything. The ring itself is the wear item, so having the replacement on the shelf saves pulling the neck twice.

Mr. Gasket 2668 Replacement Water Neck O-Rings Features:

• Direct replacement for the original rubber O-ring seal or gasket.
• Fits Mr. Gasket water necks 2660, 2661, 2663, 2667 and 9845.
• O-ring style seal helps prevent water leaks.