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http://simulatedaltitudetech.com
* ALT-7, $2,000. Provides 9,000 feet. Comes with hose and mask.
* ALT-10, $2,300. Provides 13,000 feet, but also mentions 9.5% Oxygen, which others claim is equivalent to 20,000 ft. Comes with hose and mask.These products look physically identical to the Higher Peak products.
===Colorado Altitude Training===
Colorado Altitude Training provide a wide variety of systems, but do not publish prices.