The 6MB/C-400/U30-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 382.75 to 417.25 MHz, Bandwidth 34.5 MHz (1dB), Center Frequency 400 MHz, Insertion Loss 3.05 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 6MB/C-400/U30-18 can be seen below.