The SiMS15R55/R6-6S3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 15.25 to 15.85 GHz, Center Frequency 15.55 GHz, Insertion Loss 3.5 dB, Rejection 30 dB @14.8&16.4GHz, 40 dB @14.7&16.6GHz, 55 dB @DC~14GHz, 50 dB @18~20GHz, Upper Rejection 30 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS15R55/R6-6S3 can be seen below.