Can be used with threaded pipe inserts to adjust the height of tables and chairs. If the pipe wall is too thick, it can also be inserted after proper trimming. Tube Plugs：22mm x M8，25mm x M8（Thicker），25mm x M8，30mm x M8，32mm x M8，38mm x M8，50mm x M8， 38mm x M10，16mm x M6，19mm x M6.
eBay