Introducing the Nalge Nunc Polypropylene Screw Caps (Model: NALGENE 362150-6280) in a vibrant blue color. These durable caps are designed for secure sealing of laboratory containers, ensuring your samples remain protected from contamination. Made from high-quality polypropylene, they are resistant to chemicals and can withstand a range of temperatures. The screw-on design provides a tight fit, making them ideal for both storage and transport. Perfect for researchers and lab technicians, these caps are a reliable choice for any laboratory setting. Upgrade your lab supplies with these essential screw caps!