Radia Low-E Polishing Whells: High Efficiency and Excellent Results on Glass Surfaces Radia Low-E Polishing Whells are high-quality polishing felts specially designed for low-emission glass processing applications. These felts provide superior brightness and smoothness on glass surfaces. Radia Low-E Polishing Whells deliver excellent performance, especially in the processing of Low-E glass, which is used for thermal insulation and energy efficiency.