Keysight 8494B/001 Manual Attenuator: 11dB/1dB, 18 GHz, 1W, Type-N(f), 8494x Series
Keysight N9355B Power Limiter: Protect sensitive devices from power surges with this 18 GHz, 50 Ohm, 1W limiter featuring Type-N connectors, part of the N9355/6 Series.