TCF-HK Cork Core Series Pattern: CHIKUFU wood Core: R-shaped cork core, German felt Percussion mallet, timpani About "CHIKUHU" "CHIKUHU" achieves the weight and balance of real bamboo, which is a feature of the Playwood PRO model series (genuine bamboo products), by adding it to a "wood shaft." Furthermore, it is available at a lower price and with less worry about cracking. The felt part has come off, but I think it can be used if you have it re-wrapped for a few thousand yen.