Savvy & Sorted® Large White Chalk Markers - 2 Pack * Quantity: 2 markers included * 10mm & 15mm Chalk Nib Tip * Vibrant White Ink That Won't Smudge * 3-in-1 Writing Tip * Erasable Water-based Ink * Use a Wet Cloth to Erase Best used on Chalkboard Contact Paper, Chalkboard Labels, Chalkboard Food Signs, Glass, Mirror and other Non-Porous Surfaces. Also used as Car Markers, Window Paint Markers, and Chalkboard Street Signs.