Introducing the Nalge Nunc Stopcocks, designed for precision and durability. Made from high-quality polypropylene, these stopcocks feature a Teflon resin TFE plug that ensures a leak-proof seal and excellent chemical resistance. Ideal for laboratory applications, they provide smooth operation and reliable flow control. The NALGENE 6460-0004 model is perfect for various setups, making it a versatile choice for professionals. Each stopcock is crafted for longevity and ease of use, ensuring you can focus on your work without worry. Upgrade your lab equipment with these essential stopcocks today!