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| 85561A-ATO | Calibration kit, 4-in-1, open, short, load and through, DC to 40 GHz, 2.92 mm(f), 50 ohm |
| 85561A | Calibration kit, 4-in-1, open, short, load and through, DC to 40 GHz, 2.92 mm(f), 50 ohm |
| R-51B-001-C | Return to Keysight Warranty - 1 year |