UCHIDA-Bistro Jumbo Chalk Marker. Make an eye-catching display and watch them brighten-up under a UV light. Also great for outdoor applications, chalkboards, wipe-boards, lightboards and windows. These markers are pigmented, non-toxic, xylene-free, waterbased, acid free, lead free and lightfast. This package contains one jumbo marker. Available in a variety of colors: each sold separately.