※ Description:The size in the specification options corresponds to the size A in the illustration, ie the size of the small head of the rubber stopper that is inserted into the hole. When choosing the rubber stopper, try to choose a size that is one size larger than the actual measurement opening. Only achieve the sealing effect and do not fall off.
Dimensional error information: When manufacturing parts, to make them interchangeable, the parts should be within the specified maximum and minimum limits. The permissible size variation is: tolerance, but they all fall within the scope of the industry regulations. Contact online customer service for information on specific tolerances. When the product is ordered, the tolerance is accepted by default.