The BFHK-3142+ from Mini Circuits is a Band Pass Filter with Frequency 28000 to 36000 MHz, Bandwidth 8000 MHz, Center Frequency 31.7 GHz, Insertion Loss 2.8 to 4.0 dB, Upper Rejection 30 to 75 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFHK-3142+ can be seen below.