These coils are ok for MTL vaping but the holes in the coils aren't big enough to replenish the cotton with juice quickly enough if you want to take deep inhales or chain vape.
Otherwise they're ok for basic MTL vaping.
Aspire Nautilus coils
Used to use Kangertech coils and was disappointed with how long they lasted, I decided to try Aspire Nautilus and Boy was I pleased I did. Much easier to use and the push in fitment is a breeze with no chance of cross threading or getting stuck. As usual Rainbow Vapes sold them at a great price and delivery was just so fast