beauty microneedle roller drpen needle cartridge 9/12/36/nano for ultima dr derma pen a1

cartridges of 9 pins 12 pins 36 pins 24 pins 42 pins nano needles... only suit for dr pen n2/m5/m7 dr. pen microneedling pen is more economical and healthful than derma roller, you just need to
replace cartridges after every use. dr pen microneedle uses sterile, individually-sealed, disposable needle cartridges for optimal safety and comfort.it does not destroy the structural integrity of the skin gradually remove the skin deep toxins and waste and establish a direct transportation between skin and beauty product,promote the skin metabolism,improve the ability of wound healing.syi