This is a Furminator S size (for small cats with long hair) from Spectrum Brands Japan Co., Ltd. (Japanese genuine product). The S size is for cats under approximately 4.5 kg. My cat has grown too big for it, so I am selling it. It has been used a few times, and the outer box is not included. The instructions are as shown in the second image. The selling price on Amazon was 3980 yen. Thank you.