SPH-4 Extra Large Dual Visor Flight Helmet with NVG mount. The item "SPH-4 Extra Large Dual Visor Flight Helmet with NVG mount" is in sale since Tuesday, January 21, 2020. This item is in the category "Collectibles\Militaria\Surplus\Hats & Helmets". The seller is "gunpilot1369" and is located in Ocala, Florida.