This product is a set of four compatible toner cartridges for HP LaserJet Pro printers, including models M351a, M375nw, M451dn, M451dw, and MFP M475dn. The cartridges are designed to print vibrant colours, bold and sharp text, and are equipped with the latest version of the chip. The product is manufactured in the United Kingdom and claims to provide 100% compatibility, premium and high-quality printing, and savings of up to 50% on printing costs. The set includes cartridges for black, cyan, yellow, and magenta colours, and each cartridge has a unit quantity of four. The product comes with a 1-year manufacturer warranty.