This is a set of 5 x 500KΩ potentiometers. Washers and nuts are included, one for each potentiometer. Recommended for guitars, effects pedals, and electronic projects. For guitars, this is the standard resistance value used in Les Paul models. Installing them in Jazzmaster, Stratocaster, or Telecaster models will alter the tonal characteristics. We also offer sets with different resistance values, so please take a look. I intended to order just a few for a project, but it seems the factory has a minimum order quantity in units of 100, and I ended up receiving nearly a thousand. A set of 5 x 500K potentiometers, perfect for customizing guitars and basses. - Type: Potentiometer - Resistance: 500KΩ - Quantity: Set of 5 Thank you for looking.