" THE FIREBOLT This state-of-the-art racing broom sports a streamlined, super-fine handle of ash, treated with a diamond-hard polish and hand-numbered with its own registration number. Each individually selected birch twig in the broomtail has been honed to aerodynamic perfection, giving the Firebolt unsurpassable balance and pinpoint precision. The Firebolt has an acceleration of 0–150 miles an hour in ten seconds and incorporates an unbreakable braking charm. Price on request. "

― J.K. Rowling , Harry Potter and the Prisoner of Azkaban (Harry Potter, #3)