The 800295 band stop filter has a stopband frequency of 27.5 to 31 GHz, bandwidth of 3.5 GHz, insertion loss of 2.5 dB, and rejection of 40 dB. It can handle RF power levels up to 1 W and uses hybrid technology (planar and mechanical structure with small factory tuning screw). The filters allow the user to sharply reject the 27.5 to 31 GHz frequency range while avoiding degrading a signal from 18 to 26.5 GHz and from 32 to 40 GHz. The filter has a maximum VSWR of 2:1 and has a silver-plated aluminum case that allows it to be used in naval applications that require it to withstand harsh environmental conditions, including salt spray, high levels of humidity, and wide temperature variations. It is RoHS compliant and has a 3-yr. warranty.