The 4MB/C-1765/H40-18 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1743.5 to 1786.5 MHz, Bandwidth 43 MHz (0.5dB), Center Frequency 1765 MHz, Insertion Loss 3.52 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 4MB/C-1765/H40-18 can be seen below.