PREMIUM LIQUID CHALK MARKER PENS - IJIANG chalk pens are filled with high quality water based ink, which produce vivid colors and flow smoothly on non-porous surfaces. Great chalk pens as a gift for teacher, students, artists, mom, kids, bistro owner, etc. 6mm Reversible Tip - Our chalkboard markers are designed with a 6mm bullet chisel tip so that you could write both fine and bold line by only flipping the reversible tip. NON-TOXIC and SAFE - Our blackboard markers are strictly tested and confirm to EN-71/ASTM D4236. No strong smell and safe enough for kids using. Excellent replacement of old dusty chalk. (Children under 3 years old using should be under the supervision of adult) Easy to Clean - These liquid whiteboard markers pens can be easily erased by wiping with a damp cloth or wet towel, making those painted area disappear without smudging. Fun to Use - IJIANG erasable chalk markers are great painting supplies for personal crafts making or art creating. These chalk pens work perfectly on non-porous surfaces: blackboard, whiteboard, windows, glass, mirror, bistro, plastic, metal or other varnished surfaces.