WISECO REPLACEMENT RING SET.
*  ZV type sets consist of Top Ring and Oil Ring.
*  Top Ring: Alloy steel, gas intrided flat faced.
*  Oil Ring: 3-piece oil assembly; Stainless steel flex-vent spacer, chrome faced rails.
*  The ring type and bore size (in mm) is stamped on the dome of the piston.
*  Refer to this information to order the correct replacement rings.
*  Ring styles cannot be interchanged.
*  Please note: Only WISECO replacement ring sets may be used on WISECO pistons.