The Postage Meter Ink Cartridge K-7871 is a 140 ml ink cartridge designed specifically for use with postage meters. The model number K-7871 indicates that it is compatible with a specific type of postage meter machine. This ink cartridge is essential for ensuring accurate and consistent printing of postage stamps or labels. Its compact size makes it easy to handle and store, while the high-quality ink ensures clear and professional results every time.