3M Particulate Filter, Low Profile, For Use With: 3M 5000 Series Reusable Respirators, 6000 Series Cartridges, 603 Filter Adapters and 501 Filter Retainers, N95, 0.95 Filter Efficiency, Bayonet, White, Resists: Paint Aerosol and Non-Oil Based Particles, 4.2 in L x 3.4 in H