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The Tube, a Protected Tube Mod by Cthulhu provides a user friendly and safe high-powered vaping experience.


This tube mod utilizes Cthulhu’s proprietary chip and uses a single 18650 or 18350 battery

The Cthulhu Tube Mod is sure to be the center of attention with its food grade stainless steel construction and interchangeable barrels.

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The Tube has all the key features and form factor of a mechanical style tube mod, while incorporating the safety features of a regulated device.

The Cthulhu Tube is Protected by a PBC Chip which provides Short Circuit Protection and Reverse Circuit Protection.

Keeping the user in mind the PBC Chip is easily accessible and may be replaced with the help of a single Philips screwdriver.

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Power output of the Tube is based on the current battery state that ranges from 3.2 to 4.2V and has a 40A maximum bypass output with an 18650 battery installed.

Utilizing a 18350, the battery has a maximum bypass of no less than 10A.

The atomizer resistance will fire as low as 0.1 ohms with an 18650 and as low as 0.5 ohms with an 18350.

The gold plated 510 connection of this tube mod has a 24mm diameter, allowing room for most of today’s popular RDA’s.

The Tube uses a single 18650 or 18350 battery and has a threaded battery cap and clicky firing button.

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The external body of the Cthulhu Tube is made of four separate pieces of food grade stainless steel, allowing users to change up the size and style of their device.

The internal tube is lined with insulation keeping batteries protected from day to day use.

The Tube by Cthulhu is a high powered device with a vast array of protections that allow it to provide an old school, mechanical tube mod style vaping experience with the peace of mind of the safety precautions that have become an industry standard.

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  • Proprietary Chip
    • Power Output Based on Current Battery State
    • 3.2 to 4.2V Working Voltage
    • 40A Maximum Bypass Output
      • With an 18650
    • 0.1 ohm Atomizer Resistance
      • With an 18650
    • 10A Maximum Bypass Output
      • With an 18350
    • 0.5 ohm Atomizer Resistance
      • With an 18350
  • 24mm Diameter
    • 50mm Tall With 18350
    • 110mm Tall With 18650
  • Accommodates Up To 24mm Atomizers
    • Gold Plated Connection
    • Replaceable Chip
  • Single 18650 or 18350 Battery Powered
    • Threaded Battery Cap
    • Battery Sold Separately
  • Side Firing Button
    • Gold Plated Contact
    • Built-In Battery Vent Holes
    • Safety Lock
  • Super Durable PC External Tube
    • Food Grade Stainless Steel Body
    • Internal Insulated Tube
  • PCB Circuit Board
    • Short Circuit Protection/Reverse Protection
    • Replaceable Circuit Board


  • One Cthulhu Tube Mod
  • User Manual and Warranty Card


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The Cthulhu Mulan RDTA is a rebuildable tank atomizer designed for a single coil mouth to lung vaping style.

The Mulan RDTA’s build deck is a dual post single terminal build deck and has an adjustable airflow hole located at the top of the RDTA which siphons air directly to the build deck allowing for direct contact with the coil.

With a clean black finish the Mulan will look fantastic on a multitude of mods.

For user customization, an added 2ml acrylic tank and a black MTL drip tip is included in the package.

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Going further in depth with the Mulan, this rebuildable tank atomizer measures in at 22mm base diameter, allowing compatibility with most, if not a wide variety of vape mods on the market.

The Mulan can be filled with E-liquid through a friction fit top cap.

This top fill design and can accommodate a maximum of 2ml with the pre-installed straight glass tank section and for those that prefer a acrylic tank a 2ml capacity frosted acrylic tank is included in the packaging.

Airflow can enter the RDTA through a single adjustable airflow hole located on the top cap section of the atomizer.

This airflow control hole measures 2mm in diameter and can be fully closed off.

The Mulan RDTA’s internals feature a dual post single terminal build deck that features two top mounted phillips screws.

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Smooth, controlled direct air beneath the coil allows for amazing flavor in each puff.

The overall build deck dimensions measure in at 6mm by 6mm and can accommodate a single coil build configuration.

Featuring two large wicking ports located on the sides of the coils.

This allows for fluid and smooth wicking with little to no dry hits.

As a added feature the Mulan comes with a bottom feed squonk pin, enabling users to expand their high capacity squonk bottles with 2 extra milliliters of e-juice.

Overall the Mulan MTL RDTA by Cthulhu is a great example of an excellent mouth to lung RDTA, and remains a solid option for builders and flavor chasers alike.

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Product Specifications

  • 22mm Diameter
    • 304 Stainless Steel Construction
  • 2ml E-liquid Capacity
    • Top Fill
      • Friction Fit Top Fill
      • One Fill Port
  • External Adjustable Airflow Control
    • Single 2mm Diameter
    • Fully Closeable
  • Dual Post Build Deck
    • PEEK Insulator
    • Single Terminal
      • Top Mounted Flathead Screws
      • 6mm by 6mm Build Deck
    • Single Coil
    • Two Side Wicking Cutouts
  • 510 Drip Tip Compatible
    • 4mm Bore
    • 3mm MTL Drip Tip

Product Includes

  • One Mulan MTL RDTA
  • One Accessory Pack
  • One Frosted Replacement Tank
  • One MTL 510 Drip Tip
  • One User Manual