More than an Excellent Mid-Range System, the MK21/G260 Regulator offers High Performance, Reliable SCUBAPRO Technology and Value. The SCUBAPRO MK21 is a new Compact-Sized Piston-Controlled First Stage. Close to 20%-Smaller than SCUBAPRO's MK25, MK21 is a Mid-Range Air Balanced, First Stage. Air Balanced Pistons deliver Significantly-More Air to the Second Stage than any other First Stage, while their performance is totally unaffected by the changing tank pressure. A Balanced Piston allows the use of Lighter-and-More-Sensitive Components, resulting in Ultra-Fast Breathing Response, instant delivery of air on demand, and extra high air flow, especially in low tank pressure ranges. The tired diver benefits from a smoother breathing regulator during the ascent or deco stop. Balanced Piston First Stages are the first choice of demanding sport divers and professionals. A Balanced Piston performs equally in warm and cold water environments.
The MK21 First Stage offers the best compromise for the right price and the right performance with Ease-of-Maintenance. Cold Water Diving with SCUBAPRO-Diving conditions can be drastically different, including extreme cold water and outside temperatures, posing the possibility of a regulator "freezing". Therefore, Resistance-to-Freezing is Imperative for the diver. All SCUBAPRO Regulator Systems are CE Approved for 3336psi (230 bars) Cold Water Diving. Some models go even beyond this Super-Stringent-Qualification and have successfully been Tested-in-Extreme-Cold-Diving-Conditions at less than 39°F (3.9°C). As a Specific-Anti-Freezing-Measure, SCUBAPRO engineers have designed a Patented Finned Cap for the MK21 First Stages for Optimal-Cold-Water-Diving. This Finned Cap is a Thermal Insulating System (TIS).The Ribs of the TIS Act-as-a-Radiator to Increase the Surface-Area of Heat-Transfer from the Water to Warm-Up the Internal-Parts that have been Drastically-Cooled-Down by the Gas-Pressure-Drop.
The MK21 is manufactured from Marine-Grade Chrome Plated Brass, has a Balanced Composite/Stainless Steel Flow-Thru Piston and with the Standard Head it has 4-HF (High Flow) Low Pressure (LP) Ports with Hose Routing at +/- 20° Degree Angles and 2 High Pressure (HP) Ports, one on each side of the body. The MK21 First Stage with externally adjustable intermediate pressure that allows authorized SCUBAPRO service technicians to quickly fine-tune and adjusts the first stage after maintenance without the need to disassemble it.
The G260 is a new Balanced Adjustable Second Stage featuring Metal Components for Excellent Cold Water Resistance (inlet tube, orifice, inhalation control knob and hose connector). Its High Performance makes it a choice for all Demanding Divers and it will be the natural choice for G250 fans. The new Left-Right Hose Attachment Option makes it ideally suited for Tech Diving Configurations. The G260 Air Balanced Flow Valve is made from Durable Corrosion Resistant Chrome Plated Brass. The Regulator has a Diver Adjustable Inhalation Effort that allows Personalized Breathing Control and a Venturi Initiated Vacuum Assist (VIVA) to prevents Free Flow in Cold Water or when used as an Octopus.
The G260 is equipped with a High Flow Exhaust Valve that Reduces Exhalation Effort for better Breathing Comfort. Regulator also has a High Comfort Orthodontic Mouthpiece. The Regulator comes equipped with a 3/8" Threaded Super-Flow Hose for Smooth Air Delivery. Precision Molded, Lightweight Components and Anti-Freeze Materials provide High Corrosion Resistance and Enhance Cold Water Performance. The Second Stage is equipped with a Super-Comfort High-Flow Mouthpiece. All these features produce the Highest Performance in any Conditions. The Regulator weighs 39.7 oz (1,124 g), comes with an Owner's Manual and a Limited Lifetime Warranty.
This product has a limited lifetime warranty.