The BPF-BD1800+ from Mini Circuits is a Band Pass Filter with Frequency 1600 to 2000 MHz, Center Frequency 1800 MHz, Insertion Loss 1.7 to 3 dB, Upper Rejection 20 to 45 dB, Lower Rejection 20 to 60 dB. Tags: Surface Mount, Lumped Component Filter. More details for BPF-BD1800+ can be seen below.