Pilot Gel Pen Frixion Ball , Blue , erasable ink pen - 0.7 mm
Papermate Replay Erasable Ballpoint - Medium - Assorted Colours (Blister of 10) | 2109252 | The Online Pen Company
Amazon.com: PILOT FriXion Clicker Erasable, Refillable & Retractable Gel Ink Pens, Fine Point, Assorted Color Inks, 7-Pack Pouch (31472) : Office Products
Now you see it, now you don't: Pilot's 'erasable' pens revolutionized writing - Nikkei Asia