This is a weight for practicing the basic swings in Kendo. It has a green and red cylindrical design, approximately 10cm in size. - Color: Green - Color: Red - Shape: Cylindrical - Size: Approximately 10cm How to use: First, remove the red ring, then spread the green rubber weight and insert the bamboo sword. After that, attach the red ring. I bought this about 7-8 years ago for my child's Kendo practice, but it's no longer needed as they quit. It has been used a few times. If you understand this, please consider it. I think it will help with practice. Thank you for looking.