16 White Chalk Markers By Label Me Chalk - Pens For Chalkboard Signs, Windows, Mirrors, Non-Porous Surfaces Bulk Set of 16 White Chalk Markers with Fine 3mm Tips Works on Smooth, Non-porous Surfaces Such as Glass, Ceramics, Porcelain, Plastic & Vinyl Long Lasting White Liquid Ink Prevents Smudging & Provides a Premium, Quality Finish Non-toxic and Safe to Use - No Dust, Fumes or Harsh Chemicals to Worry About Risk Free, 100% Money Back Guarantee and World Class Customer Service