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Mastercool is the leading manufacturer of professional quality A/C manifold gauge sets. Our manifold gauge sets are constructed of the finest materials and machined with precision to the highest quality standards. At Mastercool, every manifold we build is built to last. Note-close both valves on the manifold gauge set by turning the high and low knobs clockwise. The gauges are correctly calibrated If calibration is required, remove the lens and insert a straight blade screwdriver into the adjusting screw on the gauge face
59161 Instructions
