1 Arm-Evac 50 Pre Filter 5 pack Pre-filters should be changed regularly to maximize the life of the main filter. Arm-Evac 50 Pre Filter 5 pack P/N 8883-0125-P5 NSN 4130-01-499-6247 Price $46.00 Quantity Add to cart Find a Distributor Inquiry Overview Works With Compatible Products Works With