The AM453S141 from Anatech Electronics is a Band Pass Filter with Frequency 450.75 to 456.25 MHz, Bandwidth 5.5 MHz, Center Frequency 453.5 MHz, Insertion Loss 1.9 to 2.8 dB, Upper Rejection 48 dB 461.3-465.8 MHz. Tags: Surface Mount, RF SAW Filter. More details for AM453S141 can be seen below.