The Schneider Paint-It 310 Acrylic Markers feature exceptionally high-opacity, full coverage, and high-color brilliance. Good for indoor and outdoor use due to water-based, almost odorless ink. Bullet tip line width is approximately 2 mm. Ink color assortment in a wallet of six (6) includes one each of: Black, White, Blue, Violet, Red and Green. Cap color indicates ink color. Fast-drying, valve-controlled ink for creative work. Shake the marker, remove the cap, and activate it by pushing (pumping) the writing tip onto a solid surface. Best results and optimized on non-absorbent surfaces. Suitable for use with many materials including: glass, wood, metal, plastic, porcelain, stone, cardboard, paper, and more. To ensure longevity, store horizontally. Made in Germany, Schneider products are manufactured to the highest quality and environmental standards that have earned awards and accolades across the company's 80+ year history. Known for reliability, functionality and sustainability, Schneider Writing Instruments are available at excellent price points to empower creativity and pen to paper. Each thought is worth writing down - the Schneider way.