UCHIDA-Bistro Chalk Marker Fine Point. This marker will create a dustless smooth layer and rich colors that are perfect for home, the office or school projects. It can be used on whiteboards, lightboards, windows, windshields, and other non-porous surfaces. This package contains one fine point chalk marker. Available in a variety of colors, each sold separately. Non-toxic. Conforms to ASTM D 4236.