Torque limiter prevents overloading

The sealant increases STC (Sound Transmission Class) rating

convenient storage

three "AA" alkaline batteries

clean breaks

3M 6800 Full-Face Respirator Type:Mask + Filters Torque limiter prevents overloading3M Full Facepiece 6800 offers lightweight comfort and ease of use. Combine with appropriate 3M Particulate Filters or 3M Cartridges to help provide respiratory protection against particulates and or a variety of gases and vapors. Reliable, convenient, compatible respiratory protection, the 3M Full Facepiece Reusable Respirator 6000 Series offers versatility for many environments and applications and helps provide respiratory protection against a wide