JumpOff Jo’s pack of 48 liquid chalk markers is one of the best values and largest packs on the market! Enjoy the variety of colors that lead to endless possibilities. The markers are non-toxic and safe to use on any non-porous surface. The reversible 6 mm tip features a fine tip for detailed artwork, and the broad tip is ideal for broad strokes. So, whether you want to doodle on the window, or you’re in charge of updating the menu board, JumpOff Jo’s Liquid Chalk Markers are the easiest way to get creative, without the mess. Use on Non-Porous Surfaces, such as: Metal, plastic, glass, whiteboards, enamel chalkboards (never use on slate), mirrors, windows, plastic storage containers, menu boards, car windows, fridge surfaces, and more! It’s always recommended to test on the surface before use.