Uchida Bistro Chalk Marker 6mm 4 Piece Fluorescent Set Uchida Bistro Chalk Markers are great to use on chalk board, dry erase boards, light boards, windows and windshields The opaque, waterbased, pigmented formula is erasable with a damp cloth You can make an eye catching display with these beautiful colors, or choose fluorescent colors and watch them glow under an ultra violet light Store in a horizontal position when not in use and make sure cap snaps on securely Set H 4pc- Set colors include Fluorescent Pink, Fluorescent Yellow, Fluorescent Green and Fluorescent Blue