DONALDSON TORIT WSO 10 STRAIGHT OIL CARTRIDGE $450.50 DONALDSON TORIT WSO 15 STRAIGHT OIL CARTRIDGE $795.60 DONALDSON TORIT WSO 20 STRAIGHT OIL CARTRIDGE $788.80 DONALDSON TORIT WSO 25 STRAIGHT OIL CARTRIDGE $976.65 DOWNFLO EVOLUTION (DFE) ULTRA-WEB FR CARTRIDGE $277.95 DOWNFLO EVOLUTION (DFE) ULTRA-WEB CARTRIDGE $234.60 DONALDSON TORIT VH ULTRA-WEB POWERCORE FR $701.25 DONALDSON TORIT VH ULTRA-WEB POWERCORE $622.20