Perfect for windows, mirrors, car windshields, glass boards, whiteboards, slate, most chalkboards and other non-porous surfaces. 8 neon liquid chalk markers. Bold colors go on smoothly, don't smudge, and dry quickly. Washable, non-toxic, odorless, dustless. Wet or dry erase. Jumbo 3-in-1 tips for 3 writing options - thin, th or thick lines. Fun craft for adults and kids. Many uses. Great for offices, stores, restaurants, classrooms, and homes.