Achieve ultimate precision when erasing with this Tombow Mono Zero 2.3mm Eraser and Refill Slim.Simply push down on the tip, as you would with a ballpoint pen, to retract the eraser. The slim 2.3mm diameter allows clean, pinpoint erasing - it's a must-have addition to any artist's collection. It's eco-friendly, refillable and has been honoured with awards from the iF product design award in 2010, as well as the Reddot Design award in 2010. . 2.3mm diameter. Refillable. Eco-friendly. Approx. Dimensions (mm) H 150 W 45