Thank you for viewing. Mizuno Spin Trainer (Orange front, Black back) This is the Mizuno Spin Trainer. It's a training tool for developing the correct pitching form in baseball. Please refer to videos on YouTube, etc., for instructions on how to use it. I used it about 20 years ago. There are no major scratches or stains (※dust tends to stick to the black side), so I hope you can use it. - Brand: Mizuno - Model Name: Spin Trainer - Color: Orange - Color: Black Shipped via Rakuraku Mercari (envelope)