Review on Automotive Self-Centered Bonded Seal/Gasket Assortment - SWORDFISH 32241, 150-Piece, 10 Sizes (M6~M24) by George Mack

I had trouble finding them as I had no idea what they were called. I had never seen them before and when I called the tractor shop they called them something else. So I used his term and searched for them but finally found them. These o-rings worked better than the ones on the tractor. By that I mean they have a thicker rubber ring inside an outer metal ring. I had to remove the part so I reused these rings with no leaks. I can also say that this set was a lot cheaper than some of the ones I found on Revain and other sites. Most I need are the largest sizes available in this set. So I will probably never use smaller sizes. But this whole kit was still cheaper than some places wanted for just a few parts. You're worth it