Mark all kinds of materials including ceramics and metal with this pack of 12 Glass and Porcelain Marker Pens. This pack is made up of various colours including brights and metallic for all of your creative needs.These markers are 1-2mm for broad clear markings and have opaque water-based ink with a pump action nib for extra control.. Pack of 12. Works on ceramic, glass, porcelain and metal. 1-2mm nib. Pump action. Water-based. Approximate dimensions (mm) H 190 W 140 D 17