I bought these as the replacement heads for atomizer: https://www.fasttech.com/products/1407610, that I had previously bought - and are the specific heads that FT recommends for that specific atomizer model (which is a different head than the one it originaly had inside w/4 strands on each side). When I twisted these on, it didn't fire up. So I twisted it off, lubricated the strands w/some e-liquid w/my fingers, put it back on tightly as much as I could w/ a tip of a screwdriver, then took off that silicone tip, dropped in a couple of juice drops in the middle - where the coil is (to lubricate more)and then put one of my open silicone tips (from another model that allows for lubrication & more even air flow), started it up again and finally it worked perfectly.

Been using these for some time. I rewrap bats as soon as I buy them,for double protection. I use a hair dryer in highest heat setting & they come out perfect. Transparent is the perfect color for double wrapping, as one can see the original battery color & specs printed on them.

Bought 2 to try out on all my stash of all types of Kanger type atty's that take these bcc coils. They work great on all- from Evods, G50's,MT3's, protank, etc. Just ordered 12 more 10pk bags to have them in stock for future use...& of course, will be rebuilding them. Just wished FT would bring them back again at lower ohms.

Fit my Lemo Drop's perfectly. Put side by side, to the original glass, & are identical. All arrived in bubble wrap & none were broken.

Never tire of this one...my favorite. I add same amount of VG & double it; and, still remains minty & smooth.