Crystal 6.000MHz 49S 20PPM 20pF 40Ω

From the shop's description

They operate on the principle of inverse piezoelectric effect which causes it to vibrate at its natural frequency and It is then converted into oscillations.it is a component used to determine frequency. Keep your microcontroller tickin’ with a fancy timing crystal. This 6.000 MHz model comes in an HC49S (short style) standard package and easy to use with any microcontroller or device that requires an external crystal. Standerd Frequency (MHz) 6 Frequency Tolerance (ppm) ±20 Load Capacitance (pF) 20 Equivalent Series Resistance (Ω) 40 Pin Count 2 Mounting Through Hole Package HC-49S