Castel DI308E3S liquid-line filter drier, size 083S, with a 100% molecular-sieve core and a built-in moisture indicator, part number DI308E3S. Verified technical data: connection size = 1/4". Provides moisture and acid capture on the liquid line of HFC and HFO refrigeration systems while allowing the technician to read charge condition through the sight glass. Suitable for commercial refrigeration and heat-pump installations.