Vellostar Liquid Chalk Markers, Premium Quality, 6mm Reversible Nib with Bullet & Chisel Tips, Great To Paint on Glass & Non-porous Surfaces, Child Safe & Non-Toxic, 4 Extra Tips, 8 Piece Super bright neon color vellostar neon chalk markers are high-quality, super-concentrated liquid chalk and much more vibrant than regular chalk Child safe, our high quality chalk markers are water-based, non-toxic, acid-free and low odor Unique reversible tip, 4 extra replacement tips included, our liquid chalk pens have unique 6mm reversible tips (chisel/bullet) for both fine Easy to use & easy to clean up, comes in 8 vibrant colors; high-quality water-based ink will not bleed; our chalk markers are completely dust-free Great on variety material surfaces, our wet chalk markers work great on glass, metal, ceramics, LED boards, whiteboards, any hard non-porous surface