PST X Pure Bell 9 Inch. The core of the PSTX is made up of the Swiss models, cymbals that achieve a noisy, dirty, trashy sound quality by the use of specific layouts and varied sizes for the holes. Their silky surface distinguishes the cymbals visually. The aluminum Pure Bells stand out due to their distinct character and concept. The PST X Pure Bell produces a warm, balanced ping with a tight range. Perfect for mallet use.