20pcs screw top derma pen needle cartridges 9/ 12 / 36 needles electric derma stamp dermapen replacement head derma roller screw top

Needles size: 0.25mm,0.5mm,1.0mm,1.5mm,2.0mm needle no. available : 9 needles, 12 needles, 36 needles Port type: Screw top, not bayonet coupling