1st and 2 outer diameters 6.5cm  2nd 2 outer diameters 5cm  3rd, 2 outer diameters, 4cm  4th, 2 outer diameters, 3cm  Manual measurement with slight error    Instructions  1. According to the condition, acupuncture points are selected. Ashi points are the most obvious pain points. The acupuncture points indicated in the reference acupoint map are located in the midline of the human torso before and after, that is, the acupuncture points on the two veins are single acupuncture points. The other acupuncture points are arranged symmetrically.  2, select the appropriate cans and comfortable position (can be divided into sitting position, supine, side and prone position)  3. Lift the top piston of the selected tank to ensure ventilation.  4. After gently clamping the negative pressure gun mouth on the top piston of the tank, pull the rod vertically several times to the skin in the cupping, and the patient can tolerate it.  5. Connectors can be used in parts that cannot be directly cupped (such as the spine and waist). Connector installation method: first connect the connecting rod at one end of the connector to the large hole of the spare front nozzle, then connect the small end of the other end connecting rod to the negative pressure gun to make it integrated, and then the front nozzle and the cupping have a piston. Put the headguffs together and place the cupping on the area that needs treatment.  6. After the canister is adsorbed on the body surface, gently rotate the negative pressure gun to the left and right, and press the canister piston to prevent leakage.  7. Lift the piston at the end of treatment.  8. After using the cupping device, use the disinfectant and alcohol cotton. Do not soak, boil or high temperature treatment.  9. Can not be pulled during the canning treatment, please check whether the rubber plug in the cupping is tightly sealed, whether the negative pressure gun and the cupping connection are too tight, whether the negative pressure gun and the cupping are vertical, whether the pressure on the skin is negative when the negative pressure gun and the cupping are pulled