This replacement head harness assembly is designed to be used with 3M Secure Click Half Facepiece Respirators HF-801SD, HF-802SD, HF-803SD (sold separately). 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. 7100217704 - 04054596787810
