The cloisonné finger-spun cylinder, a religious artifact from the Qing dynasty, has an overall height of 226 centimeters. In Tibetan area monasteries, under the eaves or at the corners of halls, one can often see rows of upright wooden or copper-cast cylindrical prayer wheels, standing 1 to 2 meters high. They are engraved with the six-syllable mantra, encased in wood, and have axles at the top and bottom, allowing them to spin with just a light push of the hand. Smaller prayer wheels that use wind power are generally installed on rooftops or felt tents. Water-powered prayer wheels are usually installed by streams.