3M MMMHF-800-04 3M Secure Click Head Harness Assembly for HF-800 Series Respirators w Diaphragm, HF-800-04, 5/Case

• The 3M Secure Click Head Harness Assembly for HF-800 Series with Speaking Diaphragm, HF-800-04, works with 3M Secure Click Half Facepieces HF-801SD, HF-802SD, HF-803SD (sold separately).
• This harness is easy to install, can extend the service life of respiratory protection.