There are various types of shuttlecocks. Yonex inspection balls. Mainly Yonex, but other manufacturers are also mixed in. Yonex Aerosensor 300-700. New Official, Standard, etc. are also mixed in. Various manufacturers are also mixed in. - Shuttlecocks with 1-3 feathers broken - Shuttlecocks with soft feather bases - Shuttlecocks that are not perfectly circular. They can be used for badminton knock practice, and are also recommended for use in baseball club batting practice. I have checked them carefully and trimmed the feathers, but please understand that this is subjective. I have tried to exclude those with obviously reduced flight performance. Shipping will be done by putting only the shuttlecocks in a cardboard box, using the cheapest method. Please confirm and agree before purchasing. Badminton Shuttlecock Knock Practice Semi Redson Yonex Practice Baseball Club Feathers Type: Other Type: Shuttlecock