SIYOUEI ULTRA FRAME VERII TITANIUM COLOUR WITH NET 50cm (2024)Reliable Japanese standards in house production A strong ball frame made of domestically made super duralumin material, which is about half the weight of titanium and has the strength of titanium class. Tamo nets are produced in house based on our own Japanese standards. The titanium bolt part of the ball net is equipped with an air intake function through long hole machining, which is considered difficult, and provides a comfortable sliding start.