All Galfer rotors are CAD designed, then laser cut and diamond surface finished for precision fit and perfect trueness. Rotors are sold per pair for front applications and per each for rear applications. Galfer Wave Brake Rotors for Sport Bikes offer superior performance due to: lighter weight-decrease rotating mass allows for faster acceleration and quicker change of direction and turn in. Rotors typically reduce static weight by 4 pounds, self cleaning and cooling action as it rotates, full floating design, Made in the USA.