The MK 20 was (in the first years) offered with optional S.P.E.C.-Kit. When the T.I.S. came up, the MK 20 got this new system as standard fitting. The MK 20 is very widespread.The successor is the MK 25 that offers the additional feature of adjustment of the IP from outside. A retrofit-kit is available.
This reg was also (like MK 18) sold as ultralight reg made of marine alloy and as a nitrox reg.
Ports: 2 HP 7/16", 5 LP 3/8"
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