250uF/25VDC Sprague Atom TVA Capacitor, Length 1". These sturdy black jacketed axial lead aluminum electrolytic capacitors are preferred by most craftsmen for authentic vintage guitar amp and hi-fi restorations. Many of the best sounding classic guitar amps by Fender, Ampeg, Magnatone, Valco and many others used Sprague Atom series electrolytics. Why not use 'em in your next project?