Chalk markers. Brilliant chalk markers stand out brightly on blackboards, light boards, glass, and more. The wet-erase markers can be easily wiped off with a damp cloth. Suitable for glass and chalkboards. Line thickness: Medium. Color: White. Packaging unit: 2 markers. Sharpie offers a wide selection of permanent markers for the classroom, office, and home. Sharpie markers are designed for precision and performance and are available in a variety of specialty and artistic styles. Whether you need a color marker for your next art project or a professional permanent marker for work, Sharpie markers are always reliable when you need them. Looking for a fabric marker for a DIY project? Need a flip chart marker for teaching? These versatile markers with durable permanent ink work on almost any surface for the work or craft you need.