Metro Air Force Carbon Brush, 2-Pack, Blue (Colors May Vary) 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