The Centurion ArcPro screen is designed to protect against arc flash risks posed by electrical faults and is tested in accordance with EN 166. This is designed to be fitted to a Nexus, Vision, Concept Unvented or Vulcan helmet using the S57 hi-temp 300 carrier. · · · Designed to be fitted to a Nexus, Vision, Concept Unvented or Vulcan Helmet using the S57 Hi-Temp 300 Carrier · · Concept Unvented or Vulcan helmet using the S57 hi-temp 300 carrier. · · Clear ArcPro screen approved to EN 166 option 8 (Protection against Short Circuit Electric Arc) · · Approved to EN 166:2001 with the options for Face screens:- Clear: 1 B 8 9 3 (EN 170:2002 2-1,2) · · Material: ArcPro 225mm Face Screen and ArcPro 180mm Face Screen for Chin Guard: 1.5mm Polycarbonate ArcPro Brow guard and ArcPro Chin Guard: Polycarbonate ArcPro Carrier: Polyetherimide · · Screen Size: ArcPro Face Screen: 210mm visible length when fitted