This Nalgene 83B closure is a must-have for lab fluid transfer setups. It's a two-port polypropylene cap with a TPE gasket, featuring quick-disconnect fittings and barbed tubulations for 1/4-inch tubing. The smart internal valves automatically seal when you remove a tubing line, so your container (like a heavy-duty Nalgene carboy) stays sealed and sterile. It's fully autoclavable, making it perfect for sterile procedures or setting up vacuum systems. Just note: it's designed for use with heavy-duty bottles and tubing; don't use it with lighter containers under vacuum. If you're building a fermentation setup, a fluid transfer system, or need reliable ports on a bottle, this is a high-quality, dependable component. Part number 2158-0021.
