The 4MB/C-56/T7-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 52.365 to 59.635 MHz, Bandwidth 7.27 MHz (3dB), Center Frequency 56 MHz, Insertion Loss 2.12 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-56/T7-18 can be seen below.