These high-density foam plugs are a reliable and convenient solution for narrow vials, trusted by Drosophila labs for years. Precision die-cut for a uniform and snug fit, they provide an effective barrier against mites while maintaining optimal airflow through the open-cell breathable foam. The design allows for gas insertion without removing the plug, simplifying workflows and enhancing efficiency. Reusable, washable, and autoclavable, these plugs offer a cost-effective alternative to cotton, without clinging fibers or the need for frequent replacements. Their durable construction ensures they hold up to repeated use, making them ideal for labs focused on maintaining quality while managing costs. Packaged in a case of 400, these plugs are perfect for high-volume labs or those looking for dependable closures for narrow vials. Upgrade your lab with these economical and user-friendly plugs today!