DONALDSON TORIT WSO 10 STRAIGHT OIL CARTRIDGE $363.27 DONALDSON TORIT WSO 15 STRAIGHT OIL CARTRIDGE $651.12 DONALDSON TORIT WSO 20 STRAIGHT OIL CARTRIDGE $682.33 DONALDSON TORIT WSO 25 STRAIGHT OIL CARTRIDGE $863.53 DOWNFLO EVOLUTION (DFE) ULTRA-WEB FR CARTRIDGE $268.85 DOWNFLO EVOLUTION (DFE) ULTRA-WEB CARTRIDGE $227.05 DONALDSON TORIT VH ULTRA-WEB POWERCORE FR $620.77 DONALDSON TORIT VH ULTRA-WEB POWERCORE $549.68