1. specifications: Cheng Zhen has three specifications: 0.5 times 19mm, 0.5 times 25mm and 0.5 times 32mm, while Yue Zhen has only three specifications: 0.5 times 25mm, 0.5 times 30mm and 0.5 times 32mm. ..
2. Manufacturers: Cheng Zhen's manufacturer is Anhui Huatuo National Pharmaceutical Factory, and Yue Zhen's manufacturer is Anhui Shuangke Pharmaceutical Co., Ltd.