This CP piston ring set is specified for a 3.051in bore and includes a 1.0mm top ring, a 1.2mm second ring and a 2.8mm oil ring. The set is offered to match engines with the stated bore dimension, providing the standard top, second and oil ring stack for rebuilding or overhaul where those ring thicknesses and bore size are required. The description focuses on dimensional fitment rather than material claims.
CP Ring Set 1.0mm Top Ring - 1.2mm 2nd Ring - 2.8mm Oil Ring - 3.051in Bore