Signes Grimalt by Sigris - Galileo Galilei Thermometer | Glass Thermometer |15x10x10cm | Color: Transparent Measures: 15 x 10 x 10 cm | Weight: 0.295 Kgs. | Material: Glass, Glass Galileo thermometer in shades of different colors in the shape of a bulb. Each ball has a metal plate with the temperature recorded The temperature set is the lowest of the ascended balls Based on the principle of buoyancy depending on the density of a liquid and which changes according to temperature The crystal balls are immersed in an inert liquid and all materials are harmless. Good detail for the home, schools, restaurants, etc.