The AL1706L227 from Anatech Electronics is a Low Pass RF Filter with Frequency DC to 1 GHz, 3 dB Cutoff Frequency 1.706 GHz, Insertion Loss 0.6 dB, Rejection 40 to 65 dB, Return Loss 18 dB. Tags: Surface Mount, Lumped Component Filter. More details for AL1706L227 can be seen below.