How to choose roller needle length?
Needle length:0.2,0.25,0.3,0.5,0.75,1.0,1.5.2.0,2.5,3.0mm
Home Use:0.2mm,0.25mm,0.3mm 
Clinical Use:0.5mm,0.75mm 
Medical Use:1.0mm
Physician Use:1.5mm,2.0mm,2.5mm,3.0mm

Frequency Treatment: 
-0.20mm or 0.25mm roller can be used every second day.
-0.50mm roller can be used once a week. 
-1.00mm roller can be used once per three weeks.
-1.50mm and above roller should not be used more often than once every 5 weeks.
 
Function:
1.Rejuvenates skin, promotes pores and skin elasticity, will increase skin thickness.
2.Reduces appearance of cellulite, stretch marks and large pores.
3.Stimulates hair growth, improves thinning/balding hair areas.
4.Black circle remove ,scar and acne remove
5.Skin tightening and whitening