WISECO REPLACEMENT RING SET. ØØTDØtypeØsets consist ofØTWO chrome-faced high temperature steel alloyØinternally notched compression rings. Ø The ring type and bore size (in mm) is stamped on the dome of the piston. Ø Refer to this information to order the correct replacement rings. Ø Ring styles cannot be interchanged. ØPlease note: Only WISECO replacement ring sets may be used on WISECO pistons. Ø