DS Laboratories Stimuroller 0.5mm HairStimuROLLERs 540 titanium needles painlessly glide over your skin creating micro punctures that signal your skin to produce collagen and elastin. The roller dramatically enhances the absorption of topically applied products after your StimuROLLER treatment. Stimulates scalp circulation to promote healthy hair and prevent hair loss Helps increase the absorption and penetration of treatments within the skin by as much as 20 times, compared to applying