The 4MP20-6500/T500-P/P from K&L Microwave is a Band Pass Filter with Frequency DC to 6.5 GHz, Bandwidth 500 MHz, Center Frequency 3250 MHz, Insertion Loss 0.8 dB, Return Loss 14 dB. Tags: Module with Connectors, Ceramic Filter. More details for 4MP20-6500/T500-P/P can be seen below.