These premium Stabilo Pen 68 Fibre Tip pens are suitable for all creative colouring experts in school, university or at work or play and are excellent for mind mapping and colouring. The robust medium 1mm tip is great for strong lines and large areas. Featuring water-based and washable ink to produce vibrant hues, these pens have a special formula ink which will not smudge or dry out due to its long cap-off time of 24 hours.These popular pens are well known for their even ink application and remain a firm favourite in pen pots and pencil cases of all ages. . Stabilo Pen 68 Fibre Tips. Pack of 12. Robust medium 1 mm tip. Pens for all creative colouring experts. Excellent for mind mapping and colouring. Special formula ink will not smudge or dry out. Long cap-off time of 24 hours. Great for strong lines and large areas. Water-based and washable ink.. Approximate dimensions (mm) H210 W110 D10