We are supplying kinds of case and base for electronic components,such as crystal resonators,oscillators,OCXO, ... filters 55x22,36x22,36x27,20x20.......We are supplying kinds of case and base for electronic components,such as crystalresonators,oscillators,OCXO,TCXO, ... VCXO,filters and so on.If you are using such products ...