Antimicrobial resin protects barrel, grip, cone and clip. RDI (Rapid Dry Ink) is an innovative ink technology that allows ink to dry in seconds on most surfaces. Ideal for left-handed writers. Smudge proof. Convenient pocket clip. Pen Sub-Brand & Product Family: Sarasa® Dry X20+; Pen Type: Gel Pen; Pen Style: Retractable; Pen Tip Type: Conical.