Introducing the NALGENE 342825-0112 Amber Closures, designed specifically for NALGENE micro packaging vials. These closures are made from high-quality PPCO material, ensuring durability and a secure fit. Each closure is sterile, making them ideal for laboratory and medical applications where contamination must be avoided. The amber color provides UV protection, safeguarding sensitive samples from light exposure. With a reliable seal, these closures help maintain the integrity of your contents, making them a must-have for any researcher or professional in need of safe and effective storage solutions.