This Pack of 2 Posca PC-5M Marker Pens feature medium tips and a line width of between 1.8 - 2.5mm, making them versatile and perfect for all kinds of arts and crafts.The markers use water-based pigment ink to product strong, vibrant, poster-paint-like colour.Use this pen on practically any surface, including metal, wood, fabric, plastic, canvas, etc. The pen is ideal for card making, as it does not bleed through card. The pen can be easily wiped off glass, making it great to create temporary signs and window art. You can even create your own permanent designs on terracotta and glass by baking in the oven, or on clothing and other fabric by ironing on the reverse. The limitations of this pen are endless making it a must-have for any home, office and business. Instructions on how to make permanent:- Terracotta - by baking at 220 degrees for 45 minutes, then spraying with clear varnish- Porcelain - by baking at 160 degrees for 45 minutes, then spraying with clear varnish- Glass - by baking in the oven at 160 degrees for 45 minutes then spraying with clear varnish- Textiles - by ironing on reverse- Metal, plastic and wood - by spraying with clear varnish. Medium bullet tip. 1.8 - 2.5mm line width. Write on any surface. Removable from glass. No odour. Water based. Bleed-proof on paper and card