SMD 18.4320 MHz quartz resonator from IQD.
Price for 8 pieces.
Parameters:
frequency 18.4320 MHz
tolerance: 20ppm
stability 50ppm
load capacity: 16pF
stability over time 5ppm/year
dimensions: 11, 4x4.9x4.3mm
https://www.iqdfrequencyproducts.com/products/pn/LFXTAL026911Reel.pdf