O-RING( PLEASE SUPPLY O-RINGS WITH SIZES: 522X9.0 MM )

FOR MAIN ENGINE B&W (MAN) MAKER: HUDONG HEAVY MACHINERY; 
TYPE 7L42MC; SERIAL NO.DL703
BUILDING YEAR 2000; 
SPEED CMCR [RPM] 170; 
CMCR [KW] 6965; 
NO. OF CYLINDERS: 7