STABILO POWER FELT TIP PENS - 30 Assorted Colours in Wallet. Each pack contains 30 pens in a handy, re-sealable wallet. Features 30 brilliant, vibrant colours, water-based ink, and DRY SAFE ink technology allowing pens to be left uncapped for days without drying out. The pens have a sturdy, pressure-resistant tip and wash out of most textiles easily. Includes ventilated caps. Size including cap: 165 x 10mm (6.5 x 0.3 inches).