Hot Rails are one of the highest output pickups SD make. It's a humbucker that fits into a normal single coil slot, so you get the noise canceling effect without cutting a large hole in your guitar. The two thin blades with powerful coil windings give you the incredible sustain and a fat, full sound that's needed for playing heavier rock music. This rock pickup responds to the subtlest finger movements. Four conductor cable. This pickup comes in white ( shown here in black ) To check out dimensions, spec and to hear this pickup visit www.seymourduncan.com