Pads are suitable to fit both the Trodat Printy 4850 and 4850L models. 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 64850 replacement ink cartridge is available in black blue green red and violet. Additionally it is possible to purchase dual colour red and blue...