The Turbine Source Midwest Quiet Air Manual Chuck Type Replacement Turbine, Single Turbine. Ceramic Myonic bearing construction. Uniquely designed chuck assembly that extends the life of the handpiece by providing superior, long lasting bur gripping strength and true concentricity exceeding ISO standards by 50%. Manufacturer Code: MWQASTD Brand: The Turbine Source Fit: Midwest Quiet-Air Standard Packaging: Single turbine Type: Replacement turbine