Amazon.com : Liquid Chalk Markers - Set of 8 6 mm Fine Tip Chalk Pen + free 24x Chalkboard Stickers - Whiteboard Markers, chalkboard markers, Dry Erase Markers, Glass Markers, Window Markers
6mm Clear Glass – British Glass & Glazing
6 mm glas
Amazon.com: Glass Cutter Tool Mirror Cutting Tool with 2-6 mm, 5-12 mm, 12-20 mm Glass Cutter Head and Screwdriver Oil Dropper Glove for Glass Tiles Mirror Cutting : Arts, Crafts & Sewing