Staedtler Mars Micro Coloured Leads 0.5mm

Increasingly hard to find these days - coloured leads for mechanical pencils.
For use on paper, matt drafting film and tracing paper.
Easy '12-a-go' refilling for Mars micro pencils.
Suitable for use with all mechanical pencils.
Line width 0.5 mm, 3 colours - Blue Red or Green
12 leads per tube.