If the pipe wall is too thick, it can also be inserted after proper trimming. Can be used with threaded pipe inserts to adjust the height of tables and chairs. Tube Plugs：20x20mm M8，25x25mm M8，30x30mm M8，38x38mm M8，40x40mm M8，50x50mm M8，20x40mm M8，25x50mm M8，30x60mm M8，30x50mm M8，25x38mm M8.
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