The 6MB/E-1800/U250-S5A from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1652 to 1948 MHz, Bandwidth 296 MHz (1dB), Center Frequency 1800 MHz, Insertion Loss 1.24 dB, Upper Rejection 40 dB. Tags: Lumped Component Filter. More details for 6MB/E-1800/U250-S5A can be seen below.