The 2340-20-15-50 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 18.5 to 21.5 MHz, Bandwidth 3 MHz, Center Frequency 20 MHz, Insertion Loss 3 dB, Rejection 25 dB. Tags: DIP, Lumped Component Filter. More details for 2340-20-15-50 can be seen below.