These air filter vents with a 0.22 Micron rating serve as a tool for facilitating gas exchange in live culture containers, grain jars, and liquid cultures. They have a strong 3M adhesive that can endure autoclave temperatures of over 250F at 15psi for extended periods. The filter has a diameter of 19mm and an air hole measuring 10mm (.39"), making it suitable for standard 1/4" jar lid holes. This product is ideal for adhering to clean hard surfaces, including standard metal and plastic jar lids.

Features and included items:

• A sheet of 50 filter disks
• Easy peel-and-stick application for any DIY project
• Waterproof and reusable
• 3M lab-grade pharmaceutical adhesive backing
• Suitable for use on plastic, metal jar lids, or any spawn bag.