Elevate Your Jar with this Sourdough Starter Kit: Designed specifically to fit jars with a diameter of 3-4 inches, this kit transforms any ordinary jar into a professional sourdough starter jar. It streamlines the entire process, making it easy even for beginners to make their own delicious homemade sourdough. Date Marked Feeding Band Feature: Never miss a feeding date again with our unique date-marked feeding bands. They not only help you keep track of feeding schedules but also indicate the starter's initial position. This feature is invaluable for maintaining the health and vitality of your sourdough starter. Breathable Cloth Cover for Perfect Aeration: Our cloth covers are breathable to promote optimal aeration, a critical factor in sourdough fermentation. They also effectively maintain sanitation, preventing unwanted elements from contaminating your sourdough mixture. Precise Temperature Monitoring: Monitor the fermentation temperatures with pin-point accuracy using our built-in temperature monitors. This ensures that your sourdough matures in a consistent and controlled environment, leading to improved flavor profiles. note: The actual product may have slight color differences or differences, which does not affect use. Material: cotton colour: As Shown Package Contents: 2 x dust cover 2 x temperature stickers 2 x cup cover