25X 240 pF miniature size silver mica capacitors, suitable for RF preamps, etc. There are no value or voltage ratings marked on these caps. Silver Mica capacitors are low loss and very stable over extremes of temperature.
EMI low-pass filter, threaded, and hermetically sealed with glass--not epoxy. Spectrum Control part number 51-321-318. This auction is for two filters, though five are pictured.
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