Mastercool 99972 4-Way HVAC Digital Manifold With 72in Hose Set reads over 60 refrigerants, records and store up to 24 hours of data, and displays Pressures, Saturated, Actual, Superheat and Subcool Temperatures. Mastercool 99972 also has a ball valve design that includes 3/8” bore through the block, for increased flow.