GE Panametrics C-RR [PT9-CRR-10-NT] 1MHz Pair of Large Pipe C-RR-592 Transducers -40 to 150 deg C (-40 to 302 deg F) and 2 to 24 Inch Pipes. Pair of medium pipe C-RR transducers for -40 to 150 deg C (-40 to 302 deg F) applications, 50 to 600mm (2 to 24 inch) typical pipe size (C-RR-510, 1MHz), includes transducer holder for PT9 fixture.