Pentel EnerGel RTX BL77-B 0.7 mm, Red Liquid Gel Ink Rollerball Pen. EnerGel Liquid Gel Pen delivers the ultimate writing experience with a stainless steel tip and a super-smooth blend of liquid and gel inks that glide across paper. Vivid, quick-drying ink is great for left-handed writers. The acid-free ink formula is excellent for everyday notes yet safe for vital documents. 0.7mm medium metal tip conveniently retracts to protect pockets and purses. The grip is latex-free.