• P100 Particulate Filter disk is lighter than traditional filter cartridges • Wider field of vision because of low profile • Encased in plastic for durability and rough handling • Fits under welding helmets • Easy twist on/twist off, bayonet style attachment • Efficiency level of 99.97% or greater against both oil and non-oil based particulate aerosols • Piggyback the 7940 filter disk with any Moldex gas/vapor cartridge using the 7920 Piggyback adaptor • Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003 Section 7.11.1 • 100% PVC-Free®