The UIYLPF6420A1800NF from UIY Inc. is a Low Pass RF Filter with Frequency DC to 1.8 GHz, Insertion Loss 0.2 dB, Rejection 20dB at 3220-3253MHz, 30dB @ 6440-6506MHz, Lower Rejection 20dB @ 3220-3253MHz, Upper Rejection 30dB @ 6440-6506MHz. Tags: Module with Connector. More details for UIYLPF6420A1800NF can be seen below.