AS40 in Speed 3. Natural feather balls from Yonex come from Chinese geese. Springs are by-products of the food industry.
The five different products differ only in their quality. This is expressed by the number. The higher the number, the smoother the ball flies, and the longer it lasts.
AS-40 and AS-50 are Swiss Badminton approved shuttlecocks for all tournaments and interclub championships in Switzerland. The AS-30 is approved for the 3-5th league of the Interclub Championships. Otherwise, it is known as a first-class training ball, even for unlicensed players.