The 5MB/C-50/U10-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 44.6 to 55.4 MHz, Bandwidth 10.8 MHz (1dB), Center Frequency 50 MHz, Insertion Loss 1.95 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 5MB/C-50/U10-18 can be seen below.