Labels are designed for permanent applications in severe indoor or outdoor environments. Special acrylic adhesive adheres strongly, making marker removal difficult. B-946 premium outdoor grade vinyl has superior abrasion resistance and strongly adhering ink system minimizes the effect of accidental scratches and scrapes. Labels are resistant to chemicals, oil, grease, water and mild solvents. Labels are black on yellow. Standard package: letters - 25 assorted cards; numbers - 25 assorted cards.