The 4MB/C-46/T4-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 43.965 to 48.035 MHz, Bandwidth 4.07 MHz (3dB), Center Frequency 46 MHz, Insertion Loss 2.86 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-46/T4-18 can be seen below.