Safe, Low-Odor Ink: Certified non-toxic whiteboard markers meet ASTM D-4236 standards, making them safe for both kids and adults. Get the Richest Color: For the most vibrant and saturated results, we recommend using these markers on a standard porous whiteboard. Please note that on hard, non-porous surfaces like glass, acrylic or blackboard, the ink may lighten and appear less bold. Reinforced Magnetic Caps: Built-in Reinforced Magnets in Pen Cap, adhesive freely on any metal & magnetic surface; No worry about weak absorption & drop for the magnets on the white board pen. 1-2mm Precise Lines: The fine point dry erase markers work great for writing clearly, making it easier to fill the days on your calendar board/ whiteboard with more information; The marker with a small eraser can be used directly to erase small mistakes. Vibrant 12 Colors for Highlight and Color Coding: 12 bold colors magnetic whiteboard marker include Blue, Light green, orange, brown, yellow, red, aubergine, black, green, light blue, dark green, purple. Fast-drying and Easy to Wipe: The dry erase markers using high-quality German ink, ensure vibrant and long-lasting color expression; Quick dry after writing and are easy to wipe. Suitable for the non-porous surface: The dry erase markers are magnetic perfect for any magnetic whiteboard, like a fridge whiteboard.