The M 405 assembly includes a M 925 Visor, M 444 Inner Collar, and M 445 Outer Shroud. The M 925 visor is made of polycarbonate. The M 445 shroud is appropriate for general purpose use.
3M 17322, Versaflo Respiratory Helmet Assembly M-405, with Standard Visor and Shroud, 7100009447, 1 EA/Case
$626.24
Factory Stock, 7-10 Day Leadtime, Priced Per Case
Used with an approved air source, M-400 Series helmets provide respiratory (OSHA APF=1000) and limited head (ANSI Z89.1-2003 Type 1 Class G) and eye (ANSI Z87.1-2010) protection. The M-405 assembly includes a standard visor and standard shroud.

Dynabrade 95848 Dynabrade Gear Oil
Dynabrade 51854 .4 hp Trim Router (Complete), 30,000 RPM, 1/4 Collet
3M 27257, Ultra Durable 5 inch Power Sanding Discs, Universal Hole, 180 grit, 7100188462, 5 per pack
3M 16325, PPS Lid & Liner Kit, Large (28 fl oz), 125 Micron Full
Diameter Filter, 25 Lids & Liners per kit, 7100003284
3M 26022, PPS Series 2.0 Adapter, Type S12, 10 mm Male, 1.0 mm Thread, 7100135943 
