This is a complete RMC AGT14-6 [tall] pickup set and outboard PolyDrive II preamp ensemble including all components for installation into a 6-string acoustic steel-string or classical nylon-string guitar [violao]. Best fit for guitars with traditional glued-in neck joints. AGT saddles are 10.1 mm [0.400-inches] high and AGS saddles are 5.46mm [0.215-inches] high.