The B424MEZS from Knowles is a Band Pass Filter with Frequency 39.7 to 45.3 GHz, Bandwidth 5600 MHz, Center Frequency 42.5 GHz, Insertion Loss 1.5 to 2 dB, Rejection 20 to 40 MHz. Tags: Surface Mount, Ceramic Filter. More details for B424MEZS can be seen below.