Polypropylene Black Mamba Boomerang - For Ages Above 10 Years Old! From the leading USA boomerang manufacturer, Colorado Boomerangs, LLC. Our Ratings are REAL, not a result of bribes. Includes access to our "How to Throw Boomerangs" videos. Designed by a World Champion for ages = 10 - 70 years old. Includes our 24 page "How to Throw Boomerangs" booklet