Product Information Mount: 1/4" Lower Mount Size: 2-1/2" Face Select a Product Part NumberFigure IntervalMinor GradientPressure Range GLS4055.50-30 PSI GLS440300500-1500 PSI GLS4003.50-15 PSI GLS4204050-200 PSI GLS4255050-300 PSI GLS445400200-2000 PSI GLS4152020-100 PSI GLS4275050-400 PSI GLS4101010-60 PSI GLS430100100-600 PSI GLS450500500-3000 PSI GLS4172020-160 PSI GLS435200100-1000 PSI GLS45510001000-5000 PSI