i have four pistons, and wrist pins, 2 sets of rings.all new. i am looking for some answers on what sizes or applications they are.. i just ordered a cylinder and wiesco piston that is 20 over so i dont need this stuff.or maybe i will down the road,idk. two of the pistons are stamped into the top of the piston 25, one is stamped into the top of the piston 50, one is just stamped in in and says 96. the rings both boxes say 0016 piston ring, on the bottom of on box it say 3jm-11601-10 and on the other 5x8-11601-00. the boxes for the pistons have all kind of numbers on them