MAN B&W.S50MC.332B-8 PISTON RING MAN B&W.S50MC.332B-5 PISTON RING (12.5mm) MAN B&W.S50MC.332B-6 PISTON RING OPPOSITE (9.5mm) MAN B&W.S50MC.332B-7 PISTON RING (9.5mm) MAN B&W.S50MC.332B-25 O-ring MAN B&W.S50MC.332B-9 O-ring