These filters are usually German and made either by Mann, Mahle or Hummel.

A rotax part made in Italy. The one I have on my engine now is the first one of these new ones that I’ve used . With my application with a high mounted oil tank, this new green seal filter doesn’t function as the old ones did. It allows oil to drain into the engine requiring extensive burping. The check valve worked well on the previous model filter, this one doesn’t. Functions as if there is no check valve.