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Reviewed by thousands of real customers on Feefo Rated /5 from reviews

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iSub-B Tank

by Innokin

£16.99 Special Price £12.99
£16.99 Special Price £12.99
In stock

The iSub-B tank by Innokin introduces Plex 3D coils. This advanced coil designs builds on the concept of plex coils by including micro-grooves to expand surface area, leading to superb flavour production, a longer coil life, and rapid heat-up and cool-down functionality.

  • Increased surface area
  • Superb flavour
  • Automatic flood prevention
  • 90 days to change your mind
  • Description

    Plex 3D Coils: Great flavour & longevity

    All experienced vapers know that it’s not just the e-liquid responsible for creating flavours, it’s also the coils. The Plex coils that come with the Innokin I-Sub B, explained in detail here, were designed to deliver an increased surface area. These Plex 3D coils go one step further, with ‘micro grooves’ cut into the coil during the manufacturing process to further increase surface area. This increased surface area maximises the exposure to e-liquid to ensure the best possible taste.

    That’s not the only advantage of the newly designed coils. The 3D design allows the coils to heat up and cool down faster, making them more resistant to burning out and helping to maximise the life of the coils.

    Less Power, More Puffs!

    The decreased thermal mass of the coil also means that they require less power than other tanks to get the desired performance. That means less power is wasted and vape mods using the tank last longer between charges.

    Improved Wicking - Better Vaping

    The coils come with an intriguing geometric design - but this isn’t just for looks! The design creates a capillary action across the coil which draws e-liquid across more quickly and more evenly. This leads to faster wicking, better vaping and reduces the chance of a dry hit.

    Automatic flood prevention

    When you open the iSub-B to fill with e-liquid, the automatic flood prevention mechanism springs into action. This minimises the chances of leaking and flooding caused by filling!

    Organic cotton and wood pulp wicking

    The iSub-B also utilises organic cotton and pulp wood in its wicking material for a purer vape.

    Cross Compatible

    Still have old coils to use up? The iSub-B is cross compatible with all iSub coils.

    Who is the Innokin iSub-B for?

    The iSub-B is designed for experienced vapers who prefer a high VG, direct to lung hit and large clouds.

    Need to know more? See our guides here: VG v. PG | Mouth to Lung v. Direct to Lung

    Usage Guidelines

    Wattage guidelines

    0.35 ohm coil: 30-55 watts


    As with all tanks, it’s important to prime the coil before using for the first time. Simply drip a little e-liquid into the coil ports and down the centre of the coil until the wick is saturated. Then, before using for the first time, allow to stand for 5-10 so that the e-liquid can fully soak into the coil. An optional further step you can take is to take inhale without pressing the fire button - this draws the e-liquid further into the coil.


    • Twist to open Top-Cap.
    • ‘Four Point’ Adjustable Airflow.
    • Automatic fill-shield Prevents Flooding When Filling.
    • 510 Replaceable Mouthpiece.
    • Durable 510 Connection.
    • Available in Stainless Steel, Blue, Black, Gunmetal.
    • Compatible with All Innokin iSub Coils.


    • Next Generation 3D Mesh Coil Technology
    • Kanthal Material
    • Plex 3D Pattern with ‘Micro-Grooves’ Boosts Flavors.
    • Ultra-Rapid Heat-up and Cool-down Extends Coil Life.
    • High Efficiency Coil Power Flow.
    • Organic Cotton and Wood-Pulp Wicking.
    • 30 – 55 Wattage Range (0.35Ω KAL)
    • Plex 3D Coil is Compatible with Innokin iSub Tanks.

  • Whats in the Box?
    • 1x iSub-B Tank (0.35Ω Coil)
    • 1x Plex 3D Coil (0.35Ω)
    • 1x Vape Band
    • 1x Spare O-Ring Set
    • 1x Quick Start Guide
  • Reviews
  • Warranty

    At E-Cigarette Direct we pride ourselves on providing you with superb after-sales support, and aim to provide rapid replacements for any faulty device under warranty. This page details the warranties you get with your device, and how to get a replacement.

    Charging Equipment

    Your charger comes with a 12 month warranty.


    All mods and batteries are under warranty for three months. 


    All clearomisers (tanks) with the exception of CE5 clearomisers are under warranty for six months. CE5 clearomisers (tanks) are under warranty for one month.

    Please note - these warranties do not apply to the coil within a clearomiser or tank which is a consumable product as below.


    Coils are a consumable product, and as such, will be replaced only if faulty on arrival. Please let us know within 5 days of receipt if your new coil does not work.

    What does your warranty mean?

    We guarantee that your device is, and will remain, free from defects for the period of the warranty. Please note - this applies to faulty products, and not accidental damage (e.g. dropping on a hard floor!)

    The above warranties are subject to our terms and conditions. Please see our full warranty information for further details.

    What if the warranty has run out?

    We're still here to help! Many problems can be diagnosed and solved (or we can point you towards one of our helpful guides), so send us an email, give us a call for advice or pop into one of our stores for face-to-face support and help.

    How do I get a replacement?

    In the unlikely event you have a problem with your device, just contact our friendly customer service team on [email protected]

    You’ll need to return the item (we can cover a free delivery charge). If we are unable to diagnose and solve your issue, we’ll send you a replacement by Royal Mail First Class. It helps if you have your order number, but if not our team should be able to find your order using your email address.

  • Delivery & Returns

    Hassle Free Returns plus Free Delivery On Orders Over £15

    Tracked 24
    Usually next working day*
    Tracked 48
    Usually 2-4 working days*
    Up to £14.99 £3.99 £2.49
    £15 to £19.99 £1.99 FREE
    £20 + FREE -

    *Estimated delivery time based on working days and does not include weekends or Bank Holidays. Delivery times vary depending on location so please take into account typical service expectations in your area.

    Unfortunately, we can no longer deliver to EU addresses outside the UK due to new EU regulations.

    Hassle-Free Returns - & 90 Days to Change Your Mind

    Need to return an item? We aim to make the process as easy as possible (it’s also free!)

    Just send an email to our friendly customer service team on [email protected], give us a call on 01792 852843 or contact us on chat.

    When can I make a return?

    • When you have an unwanted present or have changed your mind - you’ve got 90 days to decide! Please note this only applies when you have not used the product, and it is in a resalable condition.

    • You have a faulty product under warranty.

    You can see our full returns policy in our terms and conditions.

    Not in the UK?

    You can see the full list of countries we deliver to here.

  • Product Care

    How To Maximise the Life Of Your Coils

    Coils don't last forever, but by taking a few easy steps you can often extend their life!

    First, it's well worth priming your coil before you use it for the first time. Simply add a couple of drops of e-liquid to the ports in the coil and in the opening of the coil head.

    Always allow your e-liquid to soak into your coil for at least five minutes before using it. This will help prevent your coil from burning out.

    Once you’re using the device, it is important to keep your tank topped up. If the e-liquid gets too low and the coil is exposed, the coil can burn out.


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