This fish tank stick on thermometer strip is made with safe material, which can withstand use. Features the liquid crystal and paper material, which has high durability, not easy to deform. Fine workmanship, practicality. Features -Color:Black -Material:Liquid crystal, paper -Size:13.00X2.00X0.10cm/5.11X0.79X0.04in -Temperature range: centigrade~40 degree centigrade/50 fahrenheit scale~104 fahrenheit scale - Aquarium fish tank thermometer sticker is made of liquid crystal, paper material, simple to use. - Practical design, color changing, digital thermometer sticker strip is safe to use . - The thermometer sticker can be used for fish tank for temperature testing, convenient to use. - With digital indication of temperature, the stick on thermometer strip is useful, perfect for aquarium. - Simple in structure, easy to use, not easy to deform, you can use it with confidence. Package list: 5 x Aquarium Thermometer Stickers