Usage Tips: Made of high-quality materials for durability. Nitrogen Pressure Test Table Air Conditioning Refrigeration Test Bench Tool. The spherical structure valve can replace the conventional valve, simple and convenient to use. Used for pressure testing of air conditioners, refrigerants, automobiles, and central air conditioning systems. Provides accurate nitrogen pressure testing. Large screen for easy reading. Compatible with R134a, R22, R407C, and R410A refrigerants. Product parameters: Connector size: 1/4 SAE inch Pressure range: -1 to 60 bar Diameter: 80 mm / 3.15 inches Tube length: 21 cm Material: Copper Color: As shown in image Package Contents: 1 x Nitrogen pressure test table (text and appearance on the tube may vary) Only the above items are included; other items are not part of the package. Note: Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error is +/- 1-3 cm.