This stick on thermometer strip is made of , which can withstand use. Features the liquid crystal and paper material, which has high durability, not easy to deform. Fine workmanship, practicality. Features -Color:As Shown -Material:Liquid crystal, paper -Size:13.00X2.00X0.10cm/5.11X0.79X0.04in Temperature range: 10- - Aquarium fish tank thermometer, made of color changing liquid crystal material. - No need for batteries, different than traditional temperature measurement, making it safer to use at home. - The test is accurate, keeping the current temperature of water, and intuitively prompting the level of the water temperature. - Intuitive digital indication of temperature allows the owner to set different temperatures for different fish. - Simple in structure, easy to use, not easy to deform, you can use it with confidence. Package list: 30 x Aquarium Thermometer Stickers