Carbon brush replacement * Fits Metro Air Force motors and dryer models AF1, AFTD1, EX1, AFTG1, AFTD3, CM3, EX3, and TG3 * Replacement of brushes is recommended after an average of 400 to 500 hours of dryer use * Includes 2 brushes per set * Measures 7-1/2-inch length by 5-inch width by 1-inch height