• 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

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.