Introducing the Nalge Nunc Polypropylene Screw Caps (NALGENE 362150-4200) in a vibrant green color! These durable screw caps are designed for secure sealing of laboratory containers, ensuring your samples remain protected. Made from high-quality polypropylene, they offer excellent chemical resistance and are perfect for various applications. The easy-to-grip design allows for effortless opening and closing, while the tight seal prevents leaks and contamination. Ideal for use in research, clinical, and educational settings, these caps are a reliable choice for all your storage needs. Keep your work organized and safe with Nalge Nunc!