Sealing ring, Fiber, 46.7 x 40.0 x 1.9 mm, Becker, U Series, U4.20, Part# 300094

This is a flat ring made of strong fiber material. It sits between two metal parts inside your pump. Its only job is to stop air and oil from leaking out .

The exact size is 46.7 mm outer diameter, 40.0 mm inner diameter, and 1.9 mm thick .

This sealing ring is made for one specific pump model: the Becker U4.20 .

If you have a U4.20 pump, this is the right ring for you. It is a direct replacement. No cutting. No trimming. No guessing.

This exact sealing ring comes inside two of Becker’s official repair kits.

First, it is in the Seal & Gasket Kit for U4.20 pumps (Part #54900040300) .

Second, it is in the Major Overhaul Kit for U4.20 pumps (Part #33805600000) .

That means if you are buying this single ring, you are getting the same quality part that Becker puts in their expensive overhaul kits.