Stainless Steel Propeller Paddle With Centrifugal Impeller For Benchmark 20L and 40L Overhead Stirrers, 1/EA. This stainless steel centrifugal impeller is designed as an optional propeller for specific centrifuges. Crafted by Benchmark Scientific, this propeller is a durable and reliable component for your laboratory equipment. Its stainless steel construction ensures longevity and resistance to corrosion, making it suitable for various laboratory applications. Upgrade your centrifuge with this high-quality propeller to enhance its mixing and separating capabilities. Compatible with select models, this propeller is easy to install, allowing for seamless integration into your existing equipment. Trust Benchmark Scientific for precision-engineered components that meet the demands of modern laboratory procedures.