MAN B&W.S70MC.90201-181-072 Piston ring no.1
MAN B&W.S70MC.90201-181-084 Piston ring no.2
MAN B&W.S70MC.90201-181-096 Piston ring no.3
MAN B&W.S70MC.90201-181-106 Piston ring no.4