Diagnose and charge R1234yf systems with confidence using the Mastercool 2-Way Piston Valve Manifold Gauge Set. Featuring anti-flutter gauges for steady readings, easy-to-read 3.5" dials (Bar/PSI/°F/°C), and recalibratable accuracy, this set ensures precision. Its free-floating piston valves minimize O-ring wear, while the extra-large sight glass allows clear refrigerant monitoring. Includes 72" red and blue nylon barrier hoses with 12mm-M fittings and a yellow service hose (12mm fitting and 1/2 x 16 LH acme), all meeting SAE J2888, EPA, SAE, and UL standards. R1234yf couplers with extended disconnect protection comply with SAE J639 & J2888. Packaged in a robust clamshell case, it’s ideal for UK automotive A/C professionals.
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