This filter has PACE's highest filter efficiency rating (99.99% arrestance at .2-2 microns, EU 13) and is recommended for applications in cleanroom environments or where high filtration efficiency is required. Incorporates Pre-filter (see replacement part number 8883-0112-P5), Primary Particle Filter and Gas Filter and is manufactured from non-plastic, eco-friendly materials that can be safely disposed of or recycled without processing. Replaces discontinued PACE PN 8883-0921-P1.