MSA V-Gard Standard Frame Black The Standard HDPE frame uses slot adapters compatible with any MSA slotted helmets (included with each frame) and a wide choice of V-Gard visors, Works with or without ear defenders- adaptors stow away when using ear defenders resulting in no more lost parts, Conforms to EN 166 (When worn with appropriate visor) - 3 = Liquids - 8 = Resistance to short circuit electric arc - 9 Non adherence of molten metals and resistance to penetration of hot solids - B = Medium