These components utilize 3mm bamboo bbq skewers into hanging mobiles. I snipped off the pointy end to make it square. The longer 25mm can be used to bridge 2 skewers to make a wider mobile. There are two styles of end connectors inline or offset. Some of the components are open ended to slide on the skewer to get a proper balance of your hanging objects.. Here's a link to the beautiful humming bird from Jeff Smith https://makerworld.com/en/models/422065?from=search#profileId-325049 and here's the 2d hummingbird center piece https://www.printables.com/model/807684-hummingbird-floral-2d-art. I printed these parts in I used Inland 1.75mm PLA Silky 3D Printer Filament Triple Color Mystic (Copper Purple Green) https://www.microcenter.com/product/670188/inland-175mm-pla-silky-3d-printer-filament-triple-color-10-kg-(22-lbs)-spool-mystic-(copper-purple-green) I have really enjoyed printing in this filament. Makes a single color print look as if it was a multi color print. In the 2d humming bird it looks like it was made from copper. Hope these files save you some time in having to design them yourselfs.