TSP BALSA 6.5 OFFENCE. The heart of the blade is the central core produced from balsa cross cut wood using vertically lined wood plys. This is incorporated with outer horizontal plys partly constructed from fibre glass. The vertical core acts like a series of mini springs and combined with the fibre glass creates an extremely precise and uniform bounce without vibration, plus most importantly with balsa improved strength. For power offensive players who still need feeling. The TSP 6.5mm balsa core ensures a fast shot with a lot of penetrating power during attacking rallies. Nonetheless, this light weight blade has excellent ball control, with the fibre glass veneers guaranteeing an even bigger sweet spot.