The 6MB/C-300/T40-22 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 278.2 to 321.8 MHz, Bandwidth 43.6 MHz (3dB), Center Frequency 300 MHz, Insertion Loss 2.5 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 6MB/C-300/T40-22 can be seen below.