This is a capacitor. Nothing more to say. I bought these to restore the crossovers on my KLH Model 5 (classic acoustic outboard speakers). I needed six capsules for my crossover, so I looked for something less expensive. Together with the Dayton, they are among the cheaper caps in the audio class. Electrolytic capacitors would be possible and much cheaper, but they last much longer (probably forever). Figured I could spend a little more, do it once with polypropylene and never have to worry again. I chose Solen over Dayton simply because they had exactly the values I was looking for. Beware, they're quite large (but these are all polypropylene) and you may have to rearrange things to make them fit. I had to install them at 90 degrees to the originals so I had to drill two new holes in the zipper chassis. All in all a great product!
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