screw cartridge replacement for derma pen micro needle 9 pin / 12 pin / 36 pin / 42 pin nano micro nano needles tattoo needles

advantage:
1.stimulate collagen fiber growth.
2.improve micro-circulation.
3.enhance skin care product`s activity substances into deeper skin layers.
4.treatment for hair loss,thin hair.
5.improve scars caused by acne/chicken pox/trauma.
6.stretch mark removal and stretch mark treatment. 7. be used not only for special medical care but also at home.
and
usage:
1.clean your face in normal way.
2.disinfection of needles with alcohol.
3.after about 15minutes, put needles end on your face and make it roll on your face. 4.do not force the pen into the skin but simply use mild pressure.5.clean the pen after use,store in dry & clean place.
notice:1.to disinfect before use.2.do not use,if you have below problem:purulent inflammation of the skin or acne skin,severe ac dermatitis ,diabetes and severe hypertension..syi