The ZXBF-K183+ 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 5.2 to 6.5 dB, Rejection 30 to 51 dB. Tags: Module with Connectors, Reflectionless Filter. More details for ZXBF-K183+ can be seen below.