YDRAULIC FILTER, CARTRIDGE Why Choose Donaldson Cartridge Filters • High-performance Hydraulic Cartridges utilize Donaldson media technology which undergoes stringent design and testing which sets the standard in filtration performance. • Donaldson Media Formulations provide superior hydraulic system protection. • Donaldson offers the largest selection of replacement hydraulic cartridges for greater contamination control. • A variety of WilFit cartridges which meet and/or exceed OEM specifications.