Pre-Made KA1 Flat Coil (0.4mm x 0.1mm) 0.3 Ω – 10 Pack


The KA1 Flat Coil pack features ten pre-made 0.4mm x 0.1mm KA1 coils with a 0.3-ohm resistance, offering even heating and efficient e-liquid absorption for a superior experience. Designed for ease of use and compatibility with rebuildable devices, these coils ensure a clean taste and reliable performance, making them ideal for both new and experienced users.

✔ Huge Range Available

✔ Produced In Warrington, UK

✔ Shipped Within 24 Hours

✔ 30 Day Returns Accepted

19 in stock

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Pre-Made KA1 Flat Coil

The Pre-Made KA1 Flat Coil is a pack of ten coils designed for durability and performance. This flat coil is made from FeCrAl A1 with dimensions of 0.4mm x 0.1mm and a resistance of 0.3 ohms. This coil provides a wide heating surface for a consistent and smooth experience. Considering their flat design, they allow for efficient absorption of e-liquid and uniform heating, thereby reducing the risks of burnt hits. These coils are easy to install and are great for using in a variety of rebuildable devices. This makes them an ideal choice for beginners and experienced users alike. This KA1 Flat Coil pack is an ideal solution for those who are seeking reliable, quality performance from their devices, which ensures a clean flavor profile and a satisfying experience.

About The Product

The details of this product are as follows:

  • Metal – FeCrAl A1 ( KA1)
  • Pack Size – 10 Coils
  • Resistance – 0.3 Ω
  • Coil Build – Flat Coil (0.4mm x 0.1mm)

Why Use The Crazy Wire Company

  1. Quality of products: The Crazy Wire Company always  offer high-quality products that meet industry standards and customer expectations.
  2. Selection: We offer a wide variety of wire products and sizes to meet the diverse needs of our customers. We have more than 600 products available through our site and counting. 
  3. Price: We always offer the best value possible. Our wires are available as part of our major weaving processes, so it is bought at the best possible rate. 
  4. Availability: Our products are kept in house and are ready to ship immediately. 
  5. Customer service: Our experienced staff help our customers feel confident in their purchases and provide assistance when required. 

What Else Is Available?

We do not only offer KA1 round wire. We also have a huge range of Nichrome and stainless steel round wire in immediate stock too.

Ribbon wire and flat wire are stocked for immediate dispatch too.


FAQs About This Product

How Does KA1 Flat Coil Improve E-Liquid Absorption?

With KA1 Flat Coils, e-liquid will be absorbed much better than with traditional round wire coils because of the increased surface area. Due to the ribbon-like shape, the coil can make contact with more e-liquid, which enhances the saturation of the wicking material, which is wrapped throughout the coil. Using efficient wicking technology ensures uniform heating of the e-liquid, which results in a more consistent flavor profile and more consistent vaporisation. Every draw of the device provides a more reliable user experience due to the design, which minimises dry hits.

How Do You Install A KA1 Flat Coil?

  1. Turn Off Device: Ensure you turn off and cool your rebuildable device to the touch.
  2. Access Deck: Disassemble your device to access the build deck where you can install the coil.
  3. Remove Old Coil: If replacing a coil, unscrew the terminals or posts to remove the existing coil.
  4. Prepare New Coil: Take one KA1 Flat Coil from the pack and, if necessary, adjust its legs to fit the spacing of the posts on your deck.
  5. Position Coil: Insert the ends of the coil into the terminal posts. Position the coil so that it’s in the centre and not touching any part of the deck to avoid shorts.
  6. Secure Coil: Tighten the terminal screws to secure the coil in place, ensuring the connection is firm but not so tight that the coil is damaged.
  7. Trim Excess Leads: Use wire cutters to trim the excess lengths from the coil leads as close to the post as possible to prevent shorts.
  8. Check Resistance: Use an ohmmeter or the resistance checking function on your device to ensure the coil is at the expected resistance of 0.3 ohms.
  9. Heat and Adjust: Gently pulse the power to the coil to heat it up. If there are hot spots or uneven heating, adjust the coil by strumming it with a tool or squeezing it with ceramic tweezers until it heats evenly from the inside out.
  10. Wick Coil: Thread an appropriate amount of cotton or your chosen wicking material through the coil. Ensure the cotton is snug but not too tight.
  11. Prime Coil: Saturate the wick with e-liquid and ensure that the coil has full coverage of prime.
  12. Reassemble Device: Put your device back together, refill the tank if you’re using an RTA, and you’re ready to go.


Check out our blog expanding on the difference between Clapton and Flapton coil wires. This is an extremely detailed article, which we hope will provide much insight into the subject. 

We also offer similar products through our highly popular eBay store, check us out there too.

Contact our team today if you have any questions at all. We are always really keen to help in any way that we can.


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