CNC machined from high quality aluminum to ensure that these sprockets will ROCK! Machined after anodizing for a unique look. Available sizes are: * 25 * 28 * 32 * 33 * 36 * 39 * 40 * 41 * 42 * 43 * 44 * 45 Colors: black, red, blue, gold, green, purple, Kawasaki Green, white and silver.