The Self-Inking Fingering Chart Rubber Stamps have a fingering chart design is made nice and crisp so that shapes or circles aren't filled in with ink when stamped.  This assessment tool is perfect for beginners and private lessons, as it allows you to mark fingering charts with a design that is nice and crisp. Each stamp has enough ink for approximately 5000 imprints, and refill ink is available. Contact us today to see how our products can enhance your music lessons!