WISECO REPLACEMENT RING SET. ØØXEØtypeØsets consist ofØTop Ring, Compression Ring,Øand Oil Ring. Ø Top Ring:ØAlloy steel, ferrox coated, chrome faced. Ø Compression Ring:ØCast iron, phosphate coated, taper faced. Ø Oil Ring: 3-pieceØoil assembly. Stainless steel spacer, chrome faced rails. 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.