The ACTR350/350.0/TO39 from Advanced Crystal Technology is a SAW Resonator with Frequency 349.925 to 350.075 MHz, Centre Frequency 350 MHz, Insertion Loss 1.3 to 1.8 dB, Capacitance 2.2 to 2.7 pF, Quality Factor Loaded 1850. Tags: Drop In, SAW Resonator. More details for ACTR350/350.0/TO39 can be seen below.