This is for 2 pistons for a 239 Ford Y block 1954-1955.  Also included are 8 wrist pins and clips.  From a recently closed machine shop.  Probably ordered that diameter piston for a 6 cylinder application and only used 6 of them.  This would be great if you want to replace all your wrist pins, or if you otherwise broke a piston.  These are cast pistons.