Introducing the Nalge Nunc Polypropylene Screw Caps (Model: NALGENE 362150-4384), designed for secure sealing of your laboratory containers. These vibrant green caps are made from durable polypropylene, ensuring a tight fit and excellent chemical resistance. Perfect for a variety of applications, they help prevent contamination and maintain sample integrity. Each cap features a ribbed design for easy handling and a leak-proof seal, making them ideal for both storage and transport. Upgrade your lab essentials with these reliable screw caps and enjoy peace of mind knowing your samples are well-protected!