Circular ink pads suitable to fit both the Trodat Printy 4642 Rubber Stamps. Supplied as multiple pack of two The ink is manufactured with a water base and contains no toxic substances no acid no formaldehyde and no heavy metals. The ink is hygroscopic meaning that it self regulates by absorbing the humidity of the surrounding air so that it does not dry out allowing prolonged usage. The 64642 replacement ink cartridge is available in black blue green red and violet.