Inner diameter 58.0mm. Vacuum cupping device is a kind of medical device, which is a fireless cupping device that uses air to create a vacuum and negative pressure state. There are six models of traditional Chinese medicine vacuum cupping devices. Among them, the first model has an inner diameter of 58.0mm, which is the largest size. There are also models such as No. 2 with an inner diameter of 50.0mm and No. 3 with an inner diameter of 40.0mm. Single cup cupping therapy is used for smaller lesions or tender points. A cupping pot of appropriate caliber can be selected according to the size of the lesion or tenderness. For example, for stomach problems, cupping is performed at Zhongwan point; for supraspinatus tendonitis, cupping is performed at Jianli point, etc.