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
Mastercool is the leading manufacturer of professionalquality A/C manifold gauge sets. Our manifold gauge sets are constructed of thefinest materials and machined with precision to the highest quality standards.At Mastercool, every manifold we build is built to last.