Teflon Propeller Paddle With Centrifugal Impeller For Benchmark 20L and 40L Overhead Stirrers, 1/EA.  This Benchmark Scientific centrifuge accessory features an optional Teflon centrifugal impeller, providing flexibility in your lab operations. Designed for optimal performance, this propeller ensures efficient and precise centrifugation processes. Compatible with select centrifuge models, this accessory is a valuable addition to your lab equipment arsenal. Upgrade your centrifuge with this propeller to enhance the versatility and functionality of your experiments. Ideal for various laboratory applications, this Teflon impeller is a reliable tool for achieving consistent and reliable results. Trust Benchmark Scientific for high-quality accessories that elevate your lab productivity and outcomes.