Maury Microwave 8550CK10 BNC VNA Calibration Kit: DC-10 GHz, 50 Ohm Fixed Load, 8550CK10 Series
Maury Microwave 8650CK11 TNC VNA Calibration Kit: DC-18GHz Fixed Load with Adapters (8650CKxx Series)
Maury Microwave 8650CK20 TNC VNA Calibration Kit: DC-18 GHz, Fixed/Sliding Load, 8650CKxx Series