Allows for usage of nine different colors simultaneously; blending of colors two colors of adjacent color bottles can be blended however you like; quick change of colors; vertical or horizontal positioning during use; backflushing of colors once you decide to change colors creates no loss of paint; easy transportation and connection to different sources of compressed air. Includes a Pressure Regulator (0-28 PSI) to pressurize the paint and a Color-Dial for easy, manual changing of colors. Can only be used on backsealed airbrushes. Less airbrush.