Window Markers - 15mm Jumbo - 3 in 1 Nib with 28g Ink - Pack of 8 neon Chalk pens - Loved by Teachers, Kids, Artists, Businesses - Use on Chalkboard, Whiteboard, Blackboard, Glass, Bistro POWER OF 30 CHALK MARKERS - 8 times more ink (28 gram ink per pen) and 8 marker per set - You actually get the equivalent of 30 markers at price of Eight. Other markers have 4 gram (mostly) to 8 gram ink. 3 IN ONE NIB - The Rectangular Tip enables you to use the Markers as 3 Tips - Wide Lines, bold lines & thin fine lines WRITE &gt; WIPE &gt; CREATE - USE ONLY ON NON POROUS SURFACES - Porous Surfaces will absorb ink and leave ghosting. Always test a small hidden area of the surface first. Our window paint markers have water based ink and are washable - just use a wet wipe cloth THE WOW FACTOR for YOUR BUSINESS - Turn any School Board | Glass or Window | Sign | Car Windows | LED Board | Display into a spectacular piece of art! Use them to write eye-catching menus, make boring office calendars look stunning, BEST Teacher Supplies for Classroom - Teachers are finding newer and more creative ways to teach at preschool, elementary, Kindergarten, middle and high School. - They are Eco friendly, Non Toxic, Xylene Free, Odor Free Chalkola wet erase markers are VIBRANT | BRIGHT | BOLD - Also use on Mason jars, ceramic, DIY projects, leaving personal notes on Mirror & calendar, Chalk board contact paper and roll, Plastic, Glasses doors, Thank you Card, Cafe menus, pubs, Gym boards, Lunch menu & as Dry Markers. chalkboards glass slate vinyl plastic metal