Teflon Propeller Paddle With One Line Blade For Benchmark 20L and 40L Overhead Stirrers, 1/EA. This optional Teflon propeller for the Benchmark Scientific IPS2050-P-T1 is designed for efficient mixing performance in laboratory settings. The Teflon construction ensures chemical resistance and durability, suitable for a wide range of applications. Upgrade your equipment with this one-line propeller to enhance mixing capabilities and achieve precise results in your experiments. Trust in Benchmark Scientific for high-quality lab accessories that streamline your workflow and deliver reliable results every time.