MK17 / G260 With R195 Octopus ENVIRONMENTALLY SEALED FOR TOTAL PROTECTION The ideal system for cold water or harsh conditions, tech divers and cave explorers just love this reg. If you dive deep, dive cold, or often find yourself on silty bottoms or in less-than-pristine waters, the MK17 EVO/G260 is the reg system for you. The new MK17 EVO is SCUBAPRO\'s premium high performance balanced diaphragm first stage. Engineered specifically for cold water and harsh environments, its internal components are completely sealed off from the elements so neither water nor pollution can get inside the chrome-plated marine grade brass body to foul the mechanism. This total sealing system also allows for a dry ambient pressure chamber which works to prevent freezing, provides better protection and improves performance, ensuring trouble-free operation no matter how cold or murky the water gets. This new version is more compact than its predecessor yet delivers better breathing performance. Its improved internal design allows more airflow from the LP ports which have also been configured for optimum hose routing. The venerable G260 is the most imitated air balanced second stage design of all time. First introduced in 1986 as the G250, it was the first regulator to introduce an adjustable Venturi Initialed Vacuum Assist (VIVA). Today\'s modern version features metal components (inlet tube, orifice, inhalation control knob and hose connector) for excellent cold-water performance. It also offers a left-right hose attachment option, making it a great choice for tech diving configurations. While you don\'t need cold water or a harsh ocean environment to appreciate this reg, the MK17 EVO/G260 was built for demanding divers and demanding conditions. Ideally suited to technical diving as well as cave diving, if you dive deep, dive cold, or often find yourself on silty bottoms or in less-than-pristine waters, this is the reg system for you. R195 Octopus Ready when you need it, this octo reg is easy to use and easy to see in virtually all water conditions. When you need a safe second you tend to need it quickly, so you better be able to see it, and it better be ready to deliver some air. The R195 OCTO does that and much more. The R195 is a modern second stage design based on SCUBAPRO\'s time-honored R190 but re-engineered with modern materials. It combines a classic downstream valve with a large diaphragm, functional purge button and VIVA switch for smooth and easy breathing and simple operation. Its robust construction, smooth air delivery and reliability makes the R195 a sensible second stage for new divers and a perfect choice for deco tanks thanks to its reversible hose attachment. The R195 OCTO combines all the features of the standard R195 with a high visibility yellow cover and a 39-inch yellow hose that makes it easy to share with a buddy in need. For new divers as well as veterans looking for an economical backup breather that\'s simple, dependable and features high visibility, there\'s no better choice than the R195 OCTO.