thru hole metal cover We are supplying kinds of case and base for electronic components,such as oscillator TOXO,VCXO,OCXO,filte thru hole metal cover0.Multistep rectangle filter tensile shell that using for EMC filter,EMI electronic filter......1.surface treatment:various surface plating according to customer requiments.2.various materials:copper stainless steel ,iron,kover3.we can supply various ...