MSWC : SINGLE WET SEAL
MSD-N : SINGLE DRY SEAL
MSDN-R : SINGLE DRY RETROFIT SEAL
MDUC : DOUBLE UNBALANCED SEAL
MDBC : DOUBLE DUAL BALANCED CARTRIDGE SEAL
MDBC-HD : DOUBLE BALANCED HEAVY DUTY SEAL
MDCC-R : DOUBLE RETROFIT SEAL
MDUS : DOUBLE SEAL FOR SPECIAL EQUIPMENT
