5pcs/pack
Blank Cartridge with atomizer, can be compared with the standard 510 e-cigarettes and eGo ecigs.
A 510 cartomizer is disposable part--one piece cartridge and atomizer contained in a single unit. you can fill about about 1ml e-liquid.
And one new blank 510 cartomizer can be refilled about 3-5 times.
How to fill the e-liquid to the blank/empty/old 510 cartomizer:
One new blank/empty 510 cartomizer hold about 1ml e-liquid, but we suggest you do not fill more 0.9ml, and if you old cartomier still can work, just was not e-liquid, you can refill the e-liquid by yourself too, for one old 510 cartomizer, please do not fill more 0.4ml one time.
a. Remove the 510 cartomizer’s rubber cover
A 510 cartomizer is one piece cartridge and atomizer contained in a single unit, for filling the e-cigarette e-liquid, you need to remove the cartomizer’s rubber cover first.

b. Take out the 510 cartomizer’s cover
After remove the 510 cartomizer’s rubber cover, you can find there has a plastic white 510 cartomizer cover (not gold parts) on the top of the 510 cartomizer, take out it.

c. Take out the 510 cartomizer’s rubber washer
After take off the 510 cartomizer’s cover, you still need to take out the rubber washer.
d. Fill the e-cigarette liquid to the 510 cartomizer
Now, you can draw the E-liquid inside the syringe, put the syringe into the side(notice: not center) of the 510 cartomizer.

e. Re-put the parts into the 510 cartomizer
Reput the rubber washer to the filled 510 cartomizer, the plastic cartomizer cover, the new filled cartromizer is finished now.