The 5515BP15C725 from Johanson Technology is a Band Pass Filter with Frequency 5.15 to 5.87 GHz, Bandwidth 720 MHz, Center Frequency 5510 MHz, Insertion Loss 2.5 dB, Rejection 15 to 30 dB. Tags: Surface Mount, Ceramic Filter. More details for 5515BP15C725 can be seen below.