The 6MB/C-30/T3-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 28.325 to 31.675 MHz, Bandwidth 3.35 MHz (3dB), Center Frequency 30 MHz, Insertion Loss 3.1 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 6MB/C-30/T3-18 can be seen below.