The BPF-CA-4230-4232-CUSTOM-001181 / 001181 from DETI Microwave is a Band Pass Filter with Frequency 4230 to 4232 MHz, Center Frequency 4231 MHz, Insertion Loss 0.5 dB, Upper Rejection 40 to 60 dB @4381 MHz to 12 GHz, Lower Rejection 40 to 80 dB @3700 to 4081 MHz. Tags: Module with Connectors, Cavity Filter. More details for BPF-CA-4230-4232-CUSTOM-001181 / 001181 can be seen below.