This is a Redson Class 1 certified shuttlecock. The number is 2. I bought it new for practice, but I didn't use it, so I'm selling it. I hope you can use it for your club activities or circle. Although it is a Class 1 certified shuttlecock, it is rarely sold now (because the company withdrew and stopped retail). Shuttlecocks have also gone up in price, so please use it for practice.