About this 3D model

This is attachment knob locks into Vitavia's greenhouse rails with a 90 degree twist, and unlocks just as easily when you want to move it. The attachment point might work with other greenhouse brands if the rails have these dimensions; opening gap of 6mm, inside width of 10mm, thickness of 1mm along gap. If you do have success with other greenhouses than Vitavia, please let me know in the comments.