fuzion™ cartridges are produced with the industry’s best available components, chips and high quality chemical toner & pigment ink. Our products are 100% guaranteed to meet or exceed OEM specifications in colour reproduction, yield and overall image quality OEM 55X. HP LaserJet Enterprise 500 MFP M525dn, LaserJet Pro MFP M521dn. Yields 12,500 pages. High yield. Black.