You've added a product type of to your compare. You can add up to 3 other items to be compared. To compare other item types please clear your compare.
Compare 1 Item(s)

Compared Items

Clear All
Need help? We're available to chat. You can call us on 0844 567 7073 or email us.
Free Tracked UK Delivery
On Orders Over £50
5 Star Rating
Customer Feedback
0% Finance Available
On UK Orders Over £400
Retailer Of The Year
Diver & Sport Diver
5 Star Rating
Customer Feedback
Retailer Of The Year
Diver & Sport Diver


Space Extender IDM

£739.00 RRP £739.81 SKU: 70888-5

OceanREEF Space Extender IDM
OceanREEF Space Extender IDM OceanREEF Space Extender IDM OceanREEF Space Extender IDM OceanREEF Space Extender IDM OceanREEF Space Extender IDM OceanREEF Space Extender IDM OceanREEF Space Extender IDM OceanREEF Space Extender IDM

Space Extender IDM

£739.00 SKU: 70888-5

Email When Available
Please select from the available options
Add to basket
Size Guide
More Colours Available Spend £50.00 to get free UK delivery
Add to wishlist

Earn loyalty points

equivalent - Find out more

Got A Question?

Click here to ask it



Space Extender IDM

View Basket

Finance Available At Simply ScubaFinance Available At Simply Scuba


Delivery / Returns

Add Review



Space Extender IDM

£739.00 RRP £739.81 In Stock

Brand: OceanREEF

Model: Space Extender IDM

SKU: 70888-5

The OceanREEF Space Extender Integrated Dive Mask is a superior full face mask that combines your primary 2nd stage and dive mask into one unit.  Replacing the Raptor the Extender is made for the avid diver and adventurer with more accessories and features than the entry level masks.  Covering your face you stay warmer and more comfortable as you don't get any of the jaw fatigue you can get with traditional 2nd stages.



The Extender comes as standard with a surface air valve fitted so you don't waste gas on the surface. Letting you breathe through a valve on the side of the mask you can leave the mask on before and after the dive to save gas.

The extender kit frame around the mask acts as a mounting point for cameras, torches and other accessories you may have.

The exhaust tee at the base of the mask allows you to control the direction your exhaust goes, either equally or to one side, particularly useful if you use underwater communications.

The new NACS support is sturdier than its predecessor for a more rigid mounting option for communications.  On the right side you can fit the MHA-2 Adaptor which has a  clicking, rotating support for any accessory you need.


  • Cold water certified, balanced, on demand, integrated regulator.
  • Polycarbonate visor (siloxane double coated for scratch resistance).
  • Directional exhaust valve (4 positions).
  • Dive / pre-dive switch.
  • Includes the Extender Kit (frame + accessories). 
  • SAV (Surface Air Valve) included. 

in the box

  • A padded bag to protect and carry your IDM
  • Warranty Registration - Limited Lifetime Warranty
  • The full Extender Kit (frame + accessories - frame is already mounted).
  • Equalisation plugs set. 3 sizes.
  • Screwdriver.
  • Standard Hose.

OceanREEF Space Extender IDM - Features

FeatureProduct Specification
Adjustable Exhalation
All Full-Face Masks will have a one-way purge valve at the bottom, but most will just allow the exhaust to vent in any direction. Some masks have adjustable exhalation, so you can control the exhaust to vent in one direction or increase the force required to open the valve.Close.
Quick Release
The lower points of the mask strap can be fitted with quick release mechanisms, so you can quickly pull up or push a button to loosen the mask and pull it off fast if you need to.Close.
Full Face Diving Masks can be fitted with a Surface Air Valve, so you can breathe on the surface without wasting valuable gas. While all can be fitted with a SAV some come fitted as standard.Close.
Skirt Material
The skirt is the seal around your face that stops the water from getting in. Cheaper masks will just have a Thermoplastic that will do the job but harden over time and discolour if left in the sun. Most are Silicone that are soft, create an effective seal and don't discolour quickly. The highest-grade silicone is Hypoallergenic that is purer with few impurities for a crystal-clear skirt that is soft and effective.Close.
Snorkel Top
The opening of the top of a full-face snorkel may have one of three openings; Open, Deflector or Dry. Open top snorkels are just a simple tube that allows air to flow in and out freely but will allow water in if submerged. Deflector tops prevent waves from splashing water in but will let water in if submerged but Dry tops will deflect waves and close the top of the snorkel when submerged to stop water getting in only to open again when you surface.Close.
Strap Material
Holding the mask to your head is a four- or six-point adjustable strap. Elastic Fabric straps are comfortable and don't pull on your hair but can lose their elasticity over time. Silicone straps are stretchy and grippy but can stick to your hair sometimes.Close.

We offer free tracked UK standard delivery on orders over £50.

Standard UK delivery is £3.95 for orders under £50. You will receive your order 2 - 4 days from the date of despatch. Order by 3pm on a working weekday and we will aim to despatch the same day.

Next Working Day for the UK is £6.95.

Learn more about delivery

We hope you will be completely satisfied with any product purchased from Simply Scuba.

However, you can return it for any reason within 28 days from the date of despatch for a full refund (less postage costs).

Royal Mail tracked return option within the UK for your convenience.

Learn more about returns

Watch the video

Scuba regulator Advice

Choosing The Right Regulator

Looking for advice on choosing the right regulator?

Not a problem. Watch our video from our in-house expert Mark.

What To Buy DIN Or A-Clamp

Not sure which connection to go for?

Watch our video with Mark to learn which is best for you.

What Are Cold Water Regs

What makes a good cold water regulator?

Watch our video from our in-house expert Mark to find out what to look for.