Vintage Cornell-Dubilier Greenie capacitor. Tested and working with a tester and guitar; values are good. .01 600v Ideal for humbuckers in guitars. Also suitable for other electronic components. Cornell-Dubilier Greenie capacitors are known for their high quality and excellent sound, making them popular. Cornell Series Compared to Sprague, Cornell capacitors have a wider range, extending to higher frequencies, and produce a bright sound. Subjectively, I'll describe the characteristics of each model: Black Cat: Standard bite, wide range down to the low frequencies, and a dry feel. Greenie: Similar to Black Cat, but with a slightly stronger bite and a more undulating sound. Blackie: Similar to Greenie, but with a slightly stronger bite and a wild sound quality. Tiny Chief: Slightly less low-frequency range, strong undulation. Wild sound quality. Popular for heavy and punk genres. Maroon: Similar to Tiny Chief, but with a wider range and stronger undulation. Cub: Standard bite, similar to Black Beauty but with a slightly brighter sound quality.