All the whiteboard pens produced by our company comply with the European Union's EN71-3 and EN71-9 standards, as well as the American ASTM D 4236, TRA, and LAHMA standards. They are eco-friendly products suitable for writing on surfaces such as whiteboards, glass boards, leather, rubber, and metal. They are absolutely the alternative to chalk and truly achieve a new patent product for dust-free teaching. The unique ink formula is eco-friendly and healthy, with bright colors, easy drying and erasing, and no residue. The specially designed fiber tip provides smooth and even ink flow, smooth writing, and a long writing length. They can be used completely. Suitable for use in schools, offices, factories, and other venues.