The ACTR418/418.0/F11 from Advanced Crystal Technology is a SAW Resonator with Frequency 417.925 to 418.075 MHz, Centre Frequency 418 MHz, Insertion Loss 1.6 to 2.2 dB, Capacitance 1.7 to 2.2 pF, Quality Factor Loaded 1950. Tags: Drop In, SAW Resonator. More details for ACTR418/418.0/F11 can be seen below.