Perfect for any Incentive Chart or Job Chart Pad these self-adhesive chart seals are acid-free and lignin-free. Carson-Dellosa 0.375 Dia Smiling stars chart seal is ideal for all grades and can be used on incentive charts. Seal featuring self-adhesiveness is free from acid as well as lignin and sold as 810 per pack. • All Grades. • 810 self-adhesive seals per pack. • Perfect for any Incentive Chartlet or Job Chart Pad. • Acid free and lignin free. • .375 diameter. • Great for gauging goals. • Sold as 810/Pack.