I acquired these for building a DIY vacuum tube amp and effects unit, but I no longer have time to build them, so I've decided to sell them, even though they were expensive. Recommended for tone changes on Jazzmaster, P90 single coils, humbuckers, and Stratocaster/Les Paul guitars. Try them for tone changes around 0.047μ, 0.02μ, and 0.01μ. I think it would be interesting to use these for customizing cheap guitars from Fender Japan, Squier, Epiphone, and other bizarre guitars made in Japan, Korea, and China, like current Orange Drops. Recommended for building DIY effects units, guitars, DIY vacuum tube amps, speakers, radios, etc., using components like Fender, Gibson, Sprague, Sangamo, Bumble Bee, and Orange Drop. Please purchase only if you understand the characteristics of the product and its vintage nature.