Propagation Tray Clip
thingiverse
These clips are designed to shape your propagation tray into a mini-greenhouse. Secure as many as needed around the outer edge of your tray using the inner clip side, with the hole at the top angled inward to fit snugly around your tray's perimeter. The 3mm-diameter hole in the top of each clip accommodates any 3mm rod, wire, or tube you choose to use. Consider a sturdy 3mm plastic rod or tube for optimal results. Simply bend this material into an arch that spans across your tray and connects with the opposite side. Next, stretch your plastic sheeting over the clips and around these arches to create a self-contained greenhouse environment.
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