Keysight Agilent 11901A 2.4 mm (m) to 3.5 mm (m) DC to 26.5 GHzCondition: Used Features superior RF performance with >26 dB return loss and 54 dB repeatability The Keysight 11901A is a 2. 4 mm male to 3. 5 mm male metrology grade adapter with DC to 26. 5 GHz operation. Type connector type: 2. 4 mm (m), 3. 5 mm (m) Superior RF Performance return loss: > 26 dB repeatability: 54 dB Features electrical length: 16. 1 mm (0. 63 in) overall length: 20. 9 mm (0. 82 in) diameter: 9. 0 mm (0. 35 in)