Features: Brand new and high quality Displays Degree Centigrade and Fahrenheit: The horizontal thermometer strip has a range of 18 to 34°C and 64 to 93°F Easy to stick on: Simply peel off the backing to reveal the adhesive and apply to the front of your fish tank, aquarium, carboy, jar, or fermentation bucket. Ideal for quickly monitoring the temperature of your fish tank, wine jar, or kombucha Easy to read: The thermometer sticker is made of temperature-sensitive paper Multiple quantities available: Choose from 1 piece, 10 pieces, or 20 pieces of temperature strips. Each thermometer sticker measures approximately 5.1 x 0.7 inches No battery required: These mechanical aquarium thermometers offer long-lasting performance without the need for batteries. Functions reliably in various conditions Package Includes: 1 pc, 10 pcs, or 20 pcs aquarium thermometer sticker(s) Specifications: Material: PET + Liquid Crystal Style: 1 pc, 10 pcs, or 20 pcs Size: Approx. 130 x 18 mm / 5.1 x 0.7 in Weight (Approx.): 1 pc – 2 g 10 pcs – 12 g 20 pcs – 25 g Temperature Range: 18–34°C / 64–93°F Note: 1. Please allow 0–1 cm error due to manual measurement. Ensure you are comfortable with this before purchasing. 2. Due to differences in monitor displays, the image may not reflect the actual color of the item. Thank you.