AgIC Circuit Marker (requires compatible circuit paper separately) The marker has silver-based conductive ink that dries and becomes conductive immediately on circuit paper. That can draw 40 meters. Make electronic circuits easily, so it's good for education materials as well as smooth and fast prototyping tool for electric circuits. Circuit marker lets you draw electric circuits on circuit paper. Draw your own circuit on paper, and turn LEDs or motors on. Please be noted that AgIC guarantees its performance only on AgIC circuit paper. AgIC also offers circuit marker set, which includes five sheets of circuit paper. Made in Japan