TRIED TO LOOK THESE UP , AND YESTERDAYS TRACTOR SAYS FOR A STANDARD BORE U TRACTOR, MAY FIT OTHERS I DO NOT KNOW, BUT DO KNOW THEY ARE NEW OLD STOCK NEVER OPENED MINNEAPOLIS PISTONS, I HAVE SOME OTHERS THAT ARE OPEN AND THEY APPEAR TO BE STEEL PISTONS AND ARE WRAPPED WITH ALUMINUM FOIL AS THEY DID IN THE OLD DAYS, THESE ARE QUITE RARE TO BE BRAND NEW IN THE UNOPENED BOX. IT IS A SET OF 4 AND THE BOX SAYS KE 45351 ON IT. ASK QUESTIONS AND I WILL TRY TO ANSWER THEM ACCORDINGLY. The item “GENUINE NEW OLD STOCK MINNEAPOLIS MOLINE PISTONS STANDARD U TRACTOR” is in sale since Wednesday, February 24, 2016. This item is in the category “Business & Industrial\Heavy Equipment Parts & Accs\Antique & Vintage Equip Parts”. The seller is “meateq63″ and is located in Maryville, Missouri. This item can be shipped to United States, to Canada, to United Kingdom, to China, to Mexico, to Germany, to Japan, to France, to Australia, RU.