3m 7725 prefilter p2 r 3000 series 1 piece 3m 70071544723 p align left this 3m 7725 prefilter p2 r is for the 3000 series and can be used with the 3m 8482 3351 organic vapour filter to make a versatile combined a1p2r combined filter system protects against fine dust oil and water based mist p 3m 70071544723 3000 series 7725 prefilter particles p2 r 1 piece