Hoffman Steam Air Vent 40, 1/8 Angle Steam Radiator Air Valve 401440 - 2 Pack, Model: 401440, Car & Vehicle Accessories / Parts Air Valve (non-vacuum) - Float-type Vent Single Non-Adjustable Port 1/8 NPT Angle Connection Maximum Operating Pressure 6 PSIG (0.4 bar) Get Both Parts - Great Value Pack