Keep your cultures safe and thriving using Ball Brand Mushroom Liquid Culture Jar Lids, packaged in this convenient set of 6 for wide mouth jars. They arrive ready for action - robust enough for multiple groups and projects, whether you are running trials at home or coordinating with friends. Mushroom jar lids with culture rings fit perfectly and provide the secure closure essential for growing and keeping varieties clean. Many growers report the presentation and performance of these lids as outstanding - let your own setup shine with consistent, contamination-free harvests. Take advantage of each set of 6 wide mouth culture lids to streamline operations for every stage of mushroom cultivation.