Mini Circuits
MINI-CIRCUITS BW-S10W5+ 5W 10dB DC-18GHz ATTENUATORS INTERCONNECTS
You will find that copper's thermal expansion is predictable, which helps in assemblies.
Mini-Circuits HAT-10+ 10dB Attenuator 50 Ohm DC-2GHz BNC RF Test Lab
The control panel runs on an INTEL-based system for reliability.
Mini-Circuits HAT-20+ 20dB Attenuator 50 Ohm DC-2GHz BNC RF Test Lab
What stands out about this Mini 1/4inch Double Ended tool is its compact, dual-sided design.