PLEASE NOTE - Our chalk markers work perfectly with bright and vivid colors on ALL non-porous surfaces. it's recommended to try them first on small areas and always follow the cleaning instructions provided.NOT ALL CHALKBOARDS ARE SUITABLE FOR THE USE OF CHALK MARKERS. PLEASE TRY THE MARKERS ON SMALL AREAS FIRST TO AVOID RUINING YOUR BOARD. INCREASE YOUR BUSIINESS: Add character to your establishment with GOTIDEAL LIQUID CHALK MARKER SET! it will give your project a chalk-like effect while being so much more vibrant! Perfect for use on Windows, Mirrors, Plastic,Menu Boards, Chalkboard Labels, Chalkboard Paper, Bistro Boards and more. EXTRA GIFTS - Our 12 markers pack comes with 2 extraordinary metallic colors and the BONUS of 24 CHALKBOARD LABELS, 3 TIPS for FREE. Order now and get a 90 days money back guarantee. EASY TO CLEAN - GOTIDEAL liquid chalk pens will keep your design in perfect condition,non-toxic, water-based liquid chalk markers can be erased easily by wiping the area with a damp cloth or paper towel. 12 VIVID NEON COLORS - GOTIDEAL liquid chalk pens use new upgraded ink that brings more fluorescent colors to our customers . All colors are extremely pigmented, vibrant, and long lasting. Reversible tip makes it easy to do both fine and bold work! Make beautiful artwork to creating holiday decorations for Christmas, 4th of July, Halloween, Birthdays and more. Have fun and be creative!.