Prevent tubing from coiling or floating during fluid transfer applications. Tapered hose barb fitting easily inserts into the inner diameter (ID) of flexible tubing. Keep tubing submerged in liquid, preventing floatation, and ensuring uninterrupted fluid flow. Constructed of chemically inert PTFE. Autoclavable—allowing for easy sterilization and reuse. Cole-Parmer® flow-through tubing weights provide the perfect solution for keeping tubing submerged, preventing floatation, and ensuring uninterrupted flow throughout the fluid transfer process. Crafted from high-quality PTFE, these tubing weights are chemically inert, ensuring compatibility with a wide range of fluids and preventing contamination. Weighted ends are open in the center and feature a tapered hose barb fitting for easy attachment to flexible tubing , ensuring a snug and secure fit. Designed for maximum convenience and versatility, our tubing weights are autoclavable at 121°C for 20 minutes at 15 psi.