The 6MB/C-410/U20-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 398.5 to 421.5 MHz, Bandwidth 23 MHz (1dB), Center Frequency 410 MHz, Insertion Loss 3.4 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 6MB/C-410/U20-18 can be seen below.