The Kimble/Kontes B.O.D. Stopper SNAP-LID is an essential tool for laboratory settings, designed for Biochemical Oxygen Demand (B.O.D.) testing. This pack contains 50 durable snap-lids that securely fit on standard B.O.D. bottles, ensuring airtight sealing to prevent contamination. Made from high-quality materials, these stoppers are resistant to chemicals and provide a reliable closure for your samples. Their user-friendly design allows for easy application and removal, making them perfect for efficient lab work. Enhance your testing accuracy with this practical and dependable solution!