Staedtler Assorted Dry Wipe Pens. Bullet tip dry wipe whiteboard markers in 3 assorted colours - Blue, Red & Green. Easily wipes off and is ideal for kids to write words and sentences on whiteboards. Supplied in handy classroom tub. The pen can be left with the cap off for up to 4 days without drying out. So buy this Staedtler Assorted Dry Wipe Pens Now £17.95.