After years of research, 729 has established a complete set of process systems: constant temperature, three-dimensional pressing, constant humidity and pressure adjustment process. It offers "zero" damages the wood fiber structure, and provides a new playing experience. Ebony wood outer layers, precise temperature control, cold pressing process. Lightweight KLC – T yellow Arylate Carbon, Ayous Corewood. One of the most offensive blade of 729 with clear feeling and tuch. weight: 92g +/- 2g. Total layers : 7 (5 wood + 2 KLC – T).