Comparison : Item # M16-40, 1/8 Inch (in) National Pipe Thread (NPT) Male Medical Air Demand Valve
Item # M16-50, 1/4 Inch (in) National Pipe Thread (NPT) Male Medical Air Demand Valve
Item # M16-4CV, Diameter Index Safety System (DISS) 1160-A x 1/8 Inch (in) National Pipe Thread (NPT) Male Medical Air Check Valve
Item # M16-5CV, Diameter Index Safety System (DISS) 1160-A 1/4 Inch (in) National Pipe Thread (NPT) Male Medical Air Check Valve
Item # M12-50, 1/4 Inch (in) National Pipe Thread (NPT) Male Nitrogen Demand Valve