The plastic cap is made of latex or natural rubber material, and is suitable for injection parts used with disposable infusion (blood) devices or with other medical auxiliary equipment. If this product is used as a single-use liquid (blood) device, it should be cleaned and dried with water for injection in a clean environment of 100,000 before use, and the bacterial endotoxin of each set of injection parts should not exceed 20EU, which is qualified It can be put into use only later.