Yoshimura Barrels XTREME Shaft Slate Gray 190 Slim USED Rare Extra Super Duralumin Yoshimura Barrels L-style has completed its first aluminum shaft from L-Shaft. This is the first time this material has been used in the darts industry. ※ESD stands for "Extra Super Duralumin". It is the strongest aluminum alloy material, known as Extra Super Duralumin. <What is Extra Super Duralumin?> The Japanese fighter plane, the Zero, considered a pinnacle of Japanese technology, was created with a focus on weight reduction in order to achieve maximum speed, climbing ability, and range. Although the weight reduction was extreme, engineers meticulously calculated and devised a way to give the material strength in return. The material developed at that time was Extra Super Duralumin. Extra Super Duralumin shafts are incredibly light and incredibly strong!! They are incomparable to previous aluminum shafts. These are the strongest shafts created by engineers. Please experience these shafts packed with Japanese spirit and Yoshimura spirit. These are home-stored items. Since I am an amateur, please judge the details from the images. They are secondary or tertiary market items and are not new store items, so please forgive any minor scratches.