An upgrade to the popular G260 technical diving system, the MK25 EVO BT/G260 Carbon BT regulator system delivers greater durability with a carbon fiber cover and Black Tech finish. The balanced piston MK25 EVO BT offers excellent resistance to freezing, superb inhalation sensitivity and instant delivery of air on demand. The G260 Carbon BT, with its large diaphragm, internal metal components and high-flow exhaust valve for excellent breathing sensitivity and resistance to freezing, ratchets up its ruggedness with the addition of a carbon fiber front cover.