3-Slot Low Noise Triax Cable (3 ft) for Models 236, 237, 238, 6514, 6517A, 6517B, 7072 The Keithley 7078-TRX-3 is a low noise Triax Cable terminated at boths ends in 3-Slot male triax connectors. Length: 0.9 m (3 ft) For use with: 2635B, 2636B, 6220, 6221, 6482, 6487, 6514, 6517A/B, 7072, 7174A