Bing Bongs use the popular Doobies and Blunt double cut centre dowel concept.The Bing Bongs are white and black alternating polypropylene strands surrounding a 7/16 inch centre dowel.The centre dowel is a premium birch, it is double cut down to the sweet spot.This concept allows the end to compress and open as it is played.At low volumes this dramatically increases its rebound making buzz rolls and double strokes rolls a reality.The Polypropylene reduces the overall weight on this model as compared to some other in the Performance Bundles category.