This multipack of top-quality remanufactured toner cartridges contains one each of our alternatives to the OKI 43837132, 43837131, 43837130 and 43837129.The original OKI 438371 series offers an amazing page yield from each cartridge and our remanufactured alternatives continue this tradtiion, but with a lower purchase price. The estimated page yield of the OKI 438371 range make all compatible printers some of the cheapest colour laser printers on the market to run.Our remanufactured alternatives to the OKI 438371 range uses many of the same parts, the reason for this being that our manufacturers want to maintain as much of the print quality as possible. Our remanufactured OKI 438371XX multipack comes with a 100% satisfaction guarantee.