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 Mast...

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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.

This Dual R134a/R12 2-Way Manifold Gauge Set includes: 3 - R134a nylon barrier hoses, 3 - R12 nylon barrier hoses, manual couplers, 3-in-1 side mount can tap valve and is packaged in a custom molded carrying case



  • ✅ 100% U.S. Designed, Assembled & Tested – Professional-grade manifold gauge set, engineered for R134a and R12 refrigerants, making it the perfect tool for automotive A/C technicians who demand reliable performance.
  • ✅ Durable Aluminum Block Construction – Crafted with a rugged extruded aluminum body, featuring free-floating piston valves that reduce O-ring wear, ensuring exceptional durability and an extended lifespan.
  • ✅ Precision 2-1/2" Recalibratable Gauges – Silicone-dampened gauges provide smooth and accurate pressure readings, minimizing needle vibration for precise system monitoring.
  • ✅ Premium Manual Couplers – Equipped with high-quality manual couplers, delivering superior control and durability over standard R134a couplers, ensuring a secure fit and reliable performance in heavy-duty applications.
  • ✅ Complete Hose Set with 3-in-1 Side Mount Can Tap Valve – Includes two sets of 60” SAE-approved nylon barrier hoses for R134a and R12 refrigerants, along with a 3-in-1 side mount can tap valve for R134a refrigerant and oil charge cans.
  • ✅ 100% U.S. Designed, Assembled & Tested – Professional-grade manifold gauge set, engineered for R134a and R12 refrigerants, making it the perfect tool for automotive A/C technicians who demand reliable performance.
  • ✅ Durable Aluminum Block Construction – Crafted with a rugged extruded aluminum body, featuring free-floating piston valves that reduce O-ring wear, ensuring exceptional durability and an extended lifespan.
  • ✅ Precision 2-1/2" Recalibratable Gauges – Silicone-dampened gauges provide smooth and accurate pressure readings, minimizing needle vibration for precise system monitoring.
  • ✅ Premium Manual Couplers – Equipped with high-quality manual couplers, delivering superior control and durability over standard R134a couplers, ensuring a secure fit and reliable performance in heavy-duty applications.
  • ✅ Complete Hose Set with 3-in-1 Side Mount Can Tap Valve – Includes two sets of 60” SAE-approved nylon barrier hoses for R134a and R12 refrigerants, along with a 3-in-1 side mount can tap valve for R134a refrigerant and oil charge cans.

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