The MK 25 differs from the MK 20 by the additional feature of adjustment of the IP from outside. This facilitates the service. The actual version is the MK 25 "AF" (that means Antifreeze). Feature are the gills for better exchange of warmth and therefore better traits in cold water. The MK 25 is also made from other material an then called "Titan" or "SA"(Alloy).
Ports: 2 HP 7/16", 5 LP 3/8"
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