Various manufacturers, see each individual photo for the actual part that will be sent

DIP 8 or DIP 14 packages ( all are 4 Pin )  -  choose from the drop down list above

Frequencies from 1 -125 MHz  -  choose from the drop down list above

There are different frequencies some have more zeros aftter the . which means that the value is more accurate, the more zeros the more acurate the frequancy is   eg. we have 40, 40.0, 40.000 and 40.0000 MHz so the 40.0000 MHz will be more acurate than the 40.0 Mhz