If you need an invoice, please communicate with customer service in the month the order is received. Brand: Guangyu/GUANGYU Model: Guangyi No. 3 Feather material: Duck feathers all around Ball Head: High-quality two-piece ball head Glue: High-quality nitrocellulose glue + premium resin glue Appearance: b Durability: b Flight stability: A Packaging: 12 pieces per pack Origin: Anhui, China Suitable for: indoor and outdoor training, recreational use by amateurs