FeaturesQuick-drying, smooth flowing EnerGel ink is perfect for right or left-handed writersReduces smudging on hands and paperSoft latex-free grip – comfortable and easy to use all day0.7mm tip gives approx. a 0.35mm (medium) line widthRefillableThe Pentel EnerGel X 0.7 Retractable Rollerball Pen (Box of 12) is the latest member of the EnerGel family. EnerGel X is a quick-drying, smooth-writing gel ink retractable pen with an easy-hold rubber grip and see-through barrel giving a visible ink supply on the easy-change refill.  Refillable with LR7 refill.  Pack of 12 pens with black ink.