When you need a high quality and reliable cartridge for your Sagem fax machine, choose this twin pack of genuine Sagem Black Toner Cartridges (TNR370D). The toner indicator beneath the LCD display on your Sagem fax machine will start to blink when the current cartridge is running low. Make sure you order a replacement as soon as possible and install it when you see a solidly lit toner indicator. Each cartridge in this twin pack contains enough toner to print 6,000 pages, for a total of 12,000 pages per pack.