Feature: 1. Applicable Jar Size: Our sourdough starter kit is designed for jars with a diameter of 3 to 4 inches and turns your jar into a fully functional sourdough jar. 2. Self Tracking: With the included date feeding band, you can easily keep track of the feeding schedule for your sourdough starter, ensuring consistent and timely feeding 3. Breathable Cloth Cover: The breathable cloth covers included in the kit are designed to promote aeration, which can to a healthier and more active sourdough starter. 4. Temperature Control: Include temperature strips for precise control of fermentation temperature, ensuring the optimal environment for your sourdough starter and ing to better bread. 5. Complete Set: Includes 2 breathable covers, 2 temperature strips, and 2 labeled feeding strips. Perfect for replacing or converting old jars to meet your needs. Specification: Item Type: Sourdough Starter Jar Kit Material: Burlap Purpose: Sourdough Replacement Jar Set Weight: Approx. 21.00g / 0.74oz. Package List: 2 x Cloth Cover 2 x Temperature Strip 2 x Feeding Band