The LNF-CIC0.9_1.1A from Low Noise Factory is a Cryogenic Circulator that operates from 0.9 to 1.1 GHz. It has been designed to meet the strict requirements of ultra-low temperature physics research. This circulator has gold plated OFHC copper body that ensures minimum loss and that this loss reaches the lowest possible temperature to minimize thermal noise. It provides an isolation of 20 dB and has an insertion loss of 0.3 dB. The circulator is available in a slim coaxial module that measures 31.50 x 30.86 x 12.70 mm (excluding connectors) and has SMA connectors.