Note: These are the replacement atomizers for the Evolve Plus XL, which you can find here: Evolve Plus XL Coil. However, they will fit most 510 mods.
These coils are made for the Evolve Plus XL. However, they are standard 510 thread, and will fit on most 510 mods. We use these because of their price, durability and ease of use. They're powerful, 4 coils with a ceramic post to put the extract on.
These Yocan Quad Quartz Rod Coils are the best set-up for extracts that we've found so far. This 5 pack lasts most of us a couple months, but for people who don't vape as often as we do, these could last a lot longer. We're really hard on our rigs. You can probably get a month out of each head. This pack comes with 5, so you should be good for a while.