The 1905A-6 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 7.49 to 10.69 kHz, Bandwidth 3.2 KHz, Center Frequency 9.09 kHz, Insertion Loss 1 dB, Rejection 40 dB. Tags: PCB Mount, Surface Mount, Lumped Component Filter. More details for 1905A-6 can be seen below.