Sigel Glass Board Markers, 2-3 mm round nib, 4/set, Blue/Red/Green/BlackThe four coloured glassboard markers come with a 2 3 mm round tip and are perfect for writing on white magnetic glass boards. The markers are also suitable for whiteboards and flipcharts. The non permanent ink provides good coverage and is easy to wipe off with a dry or damp cloth. The soft nib and ergonomic shape of the pens make them pleasant to write with. The SIGEL pens come in strong, bright colours and are ideal for writing on smooth surfaces in