No need for any type of thread-locking compound to be added

Meets ANSI/ASTM D120

Class E - 20

chemical & temperature resistant Hypalon reinforced base

Miller LPR-100 Half Mask Respirator PC-AR-28 No need for any typeMiller LPR 100 Half Mask Respirator, Nuisance OV Relief, Medium Large Designed to fit comfortably under most welding helmets and Weld Mask 2, the LPR 100 with Nuisance OV Relief filters features an added layer of carbon which helps remove nuisance level organic vapor odors. Offers Nuisance Level Organic Vapor Relief Nuisance Level Relief refers to concentrations not exceeding OSHA's PELs or other applicable government occupational exposure limits,