This genuine Primera Technology, Inc ink cartridge in yellow is compatible with Primera Bravo 4100 Series Printers. It is an original product and comes in a unit type of unit. The cartridge is designed for use with inkjet technology and is perfect for printing. The cartridge is model 53603 and is compatible with Primera Bravo 4100 Series Disc Publisher. It is suitable for use with a range of brands and models, including Bravo 4101 and 4102 Publishers and 4100 AutoPrinte. The cartridge is ideal for those looking for a high-quality ink cartridge that is reliable and easy to use.