4178 CLR Clear Visor, wide vision wrap-around 8" x 16.5", for F-400 or F-500 Faceshield Head Gear with Ratchet. Propionate Faceshield Window from Fibre-Metal® by Honeywell. High Performance .060" thick faceshield is stronger, more durable and more heat resistant than ordinary faceshields. SEI certified to ensure consistent quality and performance. Meets ANSI Z87.1+ standard for eye and face protection and CSA Z94.3.