CRYSTAL 20MHZ 18PF HC-49US; Frequency Nom:20MHz; Crystal Case:SMD 11.4mm x 4.65mm; Frequency Stability + / -:50ppm; Load Capacitance:18pF; Frequency Tolerance + / -:30ppm; Product Range:HCM49 Series; Crystal Mounting Type:SMD RoHS Compliant: Yes