1 Arm-Evac 500 Pre Filter Pk 5 Pre-filters should be changed regularly to maximize the life of the main filter. *UPDATE* This product is now a white in complexion, but has the exact same filtration capabilities. Arm-Evac 500 Pre Filter Pk 5 P/N 8883-0145-P5 Price $116.00 Quantity Add to cart Find a Distributor Inquiry Overview Works With Compatible Products Works With