Product Information Size: 17 x 8 cm Material: Glass The included wooden base allows for seven-color LED changes. Enjoy a variety of variations! This is a weather forecaster used by sailors in the 19th century, also known as a "storm glass." Principle: The liquid in the storm glass is sealed in a glass tube with camphor (extract of camphor tree), ethanol, etc., and reacts to changes in the climate such as atmospheric pressure, humidity, and temperature, causing the shape of the crystals to change. Weather Indications: Cloudy: The liquid becomes cloudy. Sunny: The liquid is clear, and crystals settle at the bottom. Warming up: Sediment accumulates only at a low level. Rain: The amount of crystals increases, and small crystals float. Snow: Delicate crystals like bird feathers accumulate at a high level. Notes: The change in crystals is slow, so it can be used as a reference for weather forecasting, but it is difficult to use it practically as a forecaster. Actual photos are included at the end. There are no noticeable scratches. The instruction manual and box will be included when shipped.