John Tafoya Signauture Articulate General Timpani Mallet with Bamboo Shaft (Pair). The Tafoya Signature Mallets by Grover Pro Percussion are built with high-quality bamboo shafts that are slightly shorter and thinner than Grovers Artists Choice bamboo mallets. The dimensions are 15³ length x approx 7/16³ diameter. The bamboo is finished using an amino flat finish that is both easy to grip and protects the bamboo from the elements. All shafts are hand-paired by weight, color and feel to ensure proper balance. Quality wool felts are hand-sewn over radial wood cores that provide a perfect balance of sonic "attack" and "body". The "inverted" layering of the felt is used so that extra clarity is produced across a very wide dynamic spectrum.