31 REFRIGERATION ACCESSORIES-NAMELY, FITTINGS WITH INSPECTION WINDOWS MOUNTED THEREIN, FITTINGS WITH STRAINERS MOUNTED THEREIN, FITTINGS WITH FILTERS MOUNTED THEREIN, FITTINGS WITH ABSORBENT DRYING MATERIAL MOUNTED THEREIN, SERVICE KITS WITH REPAIR PARTS FORHERMETICALLY SEALED REFRIGERATING UNITS, REFRIGERANT CHARGING STANDS (EACH INCLUDING A CYLINDER AND SIGHT FEED GAUGE GLASS WITH VALVES AND FITTINGS FOR CHARGING DETERMINABLE AMOUNTS OF REFRIGERANT), VALVES FOR REFRIGERANT COMPRESSOR OUTLETS, AND VALVES WITH NOZZLES FOR VAPORIZING REFRIGERANT