• 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
• Solid extruded aluminum body
• Free-floating piston type valves reduce O-ring wear
• Extra access port for vacuum line
• Silicone dampened gauges smooth out needle movement
• Gauges can be easily recalibrated in the field to maintain accuracy
• Extra-large sight glass for visual refrigerant check
• Large easy-to-grip knobs
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