The 5MB/C-20/T2-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 18.82 to 21.18 MHz, Bandwidth 2.36 MHz (3dB), Center Frequency 20 MHz, Insertion Loss 2.4 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 5MB/C-20/T2-18 can be seen below.