Thank you for viewing. This is a Rhythm Trainer mesh head, 10 inches. 【Important Notes】 1. I cannot answer specialized questions. 2. Please judge the condition based on the photos. This is a used item, so there are some scratches and marks. If you are concerned, please refrain from purchasing. 3. To reduce costs, I use recycled packing materials. Also, as I am an amateur packer, please forgive any imperfections. 4. Returns are not accepted. Also, shipping will mainly be on weekends, so please be aware of this. Thank you for viewing.