The XBF-183+ from Mini Circuits is a Band Pass Filter with Frequency 17.5 to 18.5 GHZ, Bandwidth 500 MHz, Center Frequency 18000 MHz, Insertion Loss 4.9 to 5.8 dB, Rejection 32 to 67 dB. Tags: Surface Mount, Reflectionless Filter. More details for XBF-183+ can be seen below.