Usage Tips:**Revised ** [Connection] CGA-580 inlet fits standard nitrogen, helium, and inert gas tanks from any supplier. 1/4-inch male flare outlet connects to HVAC charging hoses for purging, pressure testing, and high-pressure lines. [Pressure Gauge] Features two easy-to-read gauges with scratch-resistant plastic film and rubber cover. Input: 0-4000 PSI. Output: adjustable 0-600 PSI (max 800 PSI). [Material] Durable solid brass construction with a safety valve for automatic pressure release, preventing damage. [Design] Compact and leak-proof for accurate readings. T-style handle ensures easy adjustment and stability. Ideal for HVAC purging, pressure tests, brazing, and soldering. Note: Slight color variations may occur due to production batches. Color: Gold, Yellow, Black Material: Plastic, Copper, Rubber Package Includes: 1 Regulator 1 Hose (Other items not included. Slight color and size variations may exist due to lighting or display settings.) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.