(1) Genuine Fender Tone Saver premium vintage style tone cap with built-in treble bleed circuit. Classic mylar and tin foil construction for consistent top shelf tone without the usual tone change as you roll the volume down. Fits most vintage and modern guitars that use 500k pots. If you experience tonal change when turning down the volume control on your guitar, the Fender Tone Saver is a great solution. Unlike traditional treble bleed circuits that involve connecting tiny parts together with delicate soldering, the Tone Saver contains a special R/C network inside one convenient enclosure that will keep your guitar’s tone remarkably consistent at any setting. Just solder the leads to the center and outside lugs of your guitar’s volume control and you’re done. 500k audio guitar volume control.