Fender's Tone Saver, 500K, is the solution to the problem of tonal change when turning down the volume control on your guitar. Unlike other treble bleed circuits involving multiple parts and delicate soldering, the Tone Saver has a special R/C network enclosed in a single enclosure that is easily soldered to the center and outside lugs on your guitar's volume control. It will keep your guitar's tone remarkably consistent at any setting. Instructions and wiring diagram are included. The device measures 13/16 inch in length and 1/2 inch in diameter. The leads are a generous 2-1/2 inches in length. Excellent quality OEM part number 7706417049.