ColorZ Liquid Chalk Markers With 6mm Reversible Tips - Pack of 10 Bold Colors HUNDREDS OF USES - ColorZ chalk markers use a premium formula of liquid chalk that provides hundreds of opportunities for beautiful art and eye catching designs. Can be used on any non porous surface including: Bistro boards, White boards, Tiles, Glass doors, Windows, Canisters, Containers, Mason Jars, Car windows, Mirrors and hundreds of other surfaces. As long as its non-Porous it should be amazing. AMAZING COLORS - Our customers are amazed at the bright vibrant colors Colorz markers offers. While other markers may appear somewhat dead the premium formula used in ColorZ chalk markers ensures that the colors are alive and bold. Markers are dust free which makes cleanup 1-2-3. Use a dry (or slightly damp) cloth to wipe away the chalk when you are done and it will go away mess free LOADS OF FUN FOR ALL AGES - ColorZ chalk pens will give hours of fun whether for kids, students, adults or even the elderly. Guaranteed you will be coming back for more once you start having fun. PERFECT TIPS - Our quality marker is quality down to the tips. We use a high quality 6mm tip that will hold its shape even after prolonged use. The reversible sides have a chisel tip one one side for broad strokes and a fine tip for detail work. All ColorZ markers are non-toxic and odor free. PERFECT GIFT FOR ALL OCCASIONS - The ColorZ liquid chalk marker is the perfect gift for so many occasions, be it a birthday gift, graduation, Christmas, classroom gift, teacher gift, mothers day or for a just because I love you gift.