At Divers Supply you can take advantage of our 60/120 day return policy. You may order just about anything, Inspect the equipment when it arrives, and if you're not fully satisfied you can return it for a full refund (less the shipping charge, for items which we offer free shipping the original shipping savings associated with the returned item(s) will be deducted), as long as you haven't used it. We won't even ask why you've changed your mind.
No restocking fee and no questions asked (provided it has not been used). Items returned within 60 days of date of invoice, will get full refund less S/H charges, Items returned between 60-120 days of date of invoice, will get a full store credit less S/H charges.
So, you know what you want but you're on a budget? Or, you've found a lower price somewhere else? Don't worry, we have you covered.
Divers Supply is always working to give you the best SCUBA gear and equipment at the very lowest prices possible. With that, we guarantee to beat any authorized dealers price for the same product!
Another goal of Divers Supply is to fit all of the equipment you need inside your budget. We can not guarantee we can accomplish this, but we will always give it a shot!
Follow the steps below to submit your quote:
Add Product(s) to your cart, once all of your products are in the cart, choose to view and edit your cart.
In the cart click "Request a quote" and follow the proceeding instructions.
In the comments sections, tell us what you would like to pay for the product(s) in your cart. (Please add comments in the cart, ex. I found a better price at)
Submit the request and we will notify you as soon as possible; Monday - Friday.
We want to make sure we've done everything possible to get you the products you need within your budget. If you found a lower price on an identical item, tell us where.
Add a note with any special requests, shipping instructions, or important product details.
Chat with an Expert
Questions about this item?
Ask us anything, or share you feedback. Our Staff is friendly and knowledgeable and always here to help! We are committed to earning your business with excellent service and prices. Divers Supply has been in business for over 40 years and is always working to give you the best SCUBA gear and equipment at the very lowest prices possible. So chat with one of our Experts and let us help get you into the best gear at the best price! Click to Chat
Safe Water and Toxic Enforcement Act of 1986 – Warnings Required
WARNING: This Divers-supply product can expose you to cretin chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
We appreciate your decision to purchase Divers-supply products to provide the best in water experience. We take our job seriously! You may have noticed that our products now show a warning label at point of sale referring to carcinogens and birth defects. You may also have begun to see warnings related to carcinogenic substances or substances causing birth defects prominently displayed in hotel lobbies, hospitals, or other places of business recently. These warnings are required by the State of California, and we believe that an explanation of the California statute legislating the requirement will provide you valuable information regarding the relative risks of the chemicals that may be present in consumer products.
In 1986, the State of California passed the Safe Drinking Water and Toxic Enforcement Act; otherwise known as “Proposition 65” or "Prop 65". Prop 65 requires businesses like ours to disclose to individuals the presence of chemicals listed in the Act prior to point of sale. The regulations implementing this Act have been amended over time with the most recent updates will take effect on August 30, 2018. There are more than 900 chemicals on the Prop 65 Chemical List, including many chemicals that are found in components of a wide array of consumer goods or are used to manufacture components that make up consumer goods.
Prop 65 does not establish acceptable concentrations for any listed chemical; however, the agency which enforces it has established what is called "safe harbor" exposure levels for about one third of these chemicals below which warnings are not required. These "safe harbor" are established for listed carcinogens based on the quantity of the chemical that would result in one excess case of cancer in an exposed population of 100,000, assuming lifetime (70-year) exposure at the level in question. A similar process is used to establish safe harbor levels for listed reproductive toxicants. Additional information in plain language on safe harbor levels is available from the California Office of Environmental Health Hazard Assessment at http://oehha.ca.gov/Prop65/background/p65plain.html
At Divers-supply, the safety of your in water experience is our highest priority. We go to great effort to select materials that offer superior value, quality, and durability while also being generally recognized as safe and reliable for the full life of the product. Divers-supply also works closely with many regulatory bodies, such as the US Coast Guard and Underwriter’s Laboratories, to ensure the longevity of your on-water safety through targeted selection of durable, long lasting materials and components that undergo significant validation testing before being used to manufacture end items. Sometimes the safety promise we offer appears at odds with the health and safety requirements of other legislation in certain parts of the world when some regulations are updated ahead of others. To ensure compliance with applicable legal requirements, Divers-supply has placed a warning on products that contain a Prop 65 listed chemical, either directly or as a part of the raw material supply chain. This allows us to comply with California law and provide our California consumers with the disclosure required by Prop 65, while still promising the safest on water experience possible.
Divers-supply is working diligently with regulatory bodies and our own manufacturing partners to continue to improve our product performance and reduce the presence of less desirable chemicals. Water is a precious resource we all share that is important to the health and well-being of our planet and all people. Our goal is to continue to enhance your water life experience while reducing our overall impact to the planet and, in particular, its waterways. While it is a bit of a juggling act to achieve, we are confident you will see continued improvement in both the immediate and long term future. We hope this explanation will enable you to understand why you will be seeing warnings on some our products.
Thank you for your continued use of Divers-supply products.
The MK21 is SCUBAPRO's most compact balanced-piston first stage. Smaller and lighter than the MK25, it uses a smaller piston but it delivers the same level of breathing performance, no matter how hard you're breathing, how deep you're diving or what your pressure gauge reads. The MK21 also provides exceptional resistance to freezing due to the thermal exchange produced by the external fins on its polished chrome brass body.
The MK21's innovative "smart" hose layout comes with a standard cap with four low pressure ports angled (+/- 20º) to maximize hose routing. This standard cap can be replaced with an optional cap that offers four low pressure ports at more extreme angles (0°/30°) plus a fifth centralized high-flow low pressure port -- a useful configuration for technical diving.
Air-balanced flow-through piston provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
Polished chrome plated marine grade brass body is close to 20 percent smaller than the MK25, making it an easy travel companion.
Unique thermal exchange design with external fins optimizes freezing resistance.
Two high pressure ports, one on each side of the body, allows the first stage to be positioned either up or down.
Standard "smart" hose routing cap offers four low pressure ports angled for more convenient hose routing (+/- 20º).
Optional hose routing cap increases routing configurations with four angled low pressure ports (0°/30°) plus a fifth centralized high-flow low pressure port, ideal for technical diving.
Redesigned yoke allows for easier mounting on a cylinder, and redesigned cap protects internal components from water intrusion after the dive.
Available in either 3364psi/232bar INT or 4350psi/300bar DIN configurations.
Weight: INT 232 (oz/g): 27.5/780; DIN 300 (oz/g): 19.7/560.
Airflow at 2900psi/200bar: (l/min/SCFM): >7500/265.
Intermediate pressure (psi/bar): 133-142/9.2-9.8.
California residents please click here for Proposition 65 WARNING
Buy ScubaPro MK21 First Stage from Divers Supply at the best price. ScubaPro MK21 First Stage comes with full Manufacturers warranty because Divers Supply is an authorized dealer for everything we sell.