Introducing the Hydrafacial Handle Pen Filter, to ultimate and control the suction of the hydrafacial treatment. The Hydrafacial Handle Pen Filter is also the best option to not waste your hrydra solutions. So why wait? Take your hydrafacails routine up a notch with the powerful Hydrafacial Handle Pen Filter today! To be used with Hydrofacial machines at the abrasion handle pen. The abrasion handle pen is used to cleanse, exfoliate, extract impurities, and deliver rejuvenating serums. Therefore, it shouldn't be used without a filter.