Telescopic umbrella connector piece
thingiverse
the old connector broke, so I quickly made a new one. Needs 2 bolts, 4 washers, 1 nut (for lower part) and 1 wing nut (for upper part) to work. Printed with PLA, 25% hexagonal infill. This is quite sturdy. The thing can be customized, see the OpenSCAD script.
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