This breather filter is designed to fit Radium Engineering oil catch tanks which have am AN -10 ORB outlet fitting. The breather filter should be used when the tank is being vented to atmosphere as it prevents oil vapour contaminating engine bay components.Fits Radium Engineering oil catch tanksAN -10 ORB fittingSuitable for vent to atmosphere applicationsHigh strength, double layer pleated cotton filtration element for maximum filter performance