REDline Spinning Turbo Turbocharger "Extreme Boost" 4 Keychain Set - Chrome + Gunmetal + Matte + Gold 4 Keychain Set - Chrome + Gunmetal + Matte + Gold Turbine will rotate when air is blown into it (see note below) Keychain dimensions are approximately 1.75 x 1.25 inches **USE OF STRAW OR CANNED/COMPRESSED AIR RECOMMENDED TO SPIN TURBINE**