This is a new in the package ring set  (complete set of rings for all 4 pistons) for the  1975 1976 1977 Honda CB400F Four cylinder Honda.  These are the smooth,  four-stroke 400cc Honda motorcycles that still turn heads.  This is a standard size (STD) ring set.  This has the 2 compression rings and the lower 3pc oil control ring, everything to get your piston compression back where it should be. Again you will be getting all 4 rings sets..1 for each piston in this purchase. A great deal!   Get your old bike up and running again. We only sell the best! Top-quality aftermarket item.