Streamline’s cyclemaster® ball valves feature full port construction. Environmentally friendly, chromium-plated balls for reduced wear and extended seal life mcm„¢ seal technology for industry-leading longevity and low leak rates. rupture-proof encapsulated stem. compatible with all cfc, hcfc and hfc refrigerants and oils. operating temperature ranges from -40° f to 300° f max. work pressure of 700 psig. rohs compliant. a quality product from mueller industries, usa.