The SiMS25/4-6P2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 23.1 to 27.3 GHz, Center Frequency 24.6 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @21.6GHz&29.4GHz, 40 dB @21.3GHz&30.2GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS25/4-6P2 can be seen below.