1/2inch Fuel feed and vent applications on Trailer Boats. Meets USCg Type A1 Standard. Flame Retardant Cover. TYPE A1: Suitable for confined spaces or underdeckTYPE B1: Not suitable for confined spaces or underdeckThis premium quality marine fuel line from Mako is suitable for marine diesel and gasoline blendsFor connection between rigid fuel distribution lines and motor where the hose is in an undefloor or open environment. Black nitrile rubber tube to USCG standardsSynthetic braid reinforcement.Cover:TYPE A1: Flame retardent coverTYPE B1: Fire resistant cover.Temperature range:TYPE A1: -30° C to 95° CTYPE B1: -20° C to 70° CWorking Pressure Bar:TYPE A1: 13.5 BarTYPE B1: 3.5 Bar