My mom wanted something to holds foil on her small greenhouse, they added only couple clips. Based on those i designed simple clips that fits and holds foil. It was made for 30x30 mm plastic tube. Clips have dimensions 40x40mm, 4mm thick to leave 1mm clearance at each side. Its easier to put it on this and still tightly holds up.
There is square version like on photos and with round edges. Also added STEP file if someone want to edit it a little.
I used PETG since it will be outdoor but probably PLA is fine too. Printed with 2 perimeters and 2 layers bottom/top, 10% infill and it requires only 4.14 grams or 1.56m of plastic where round version takes 3.99 grams (so 4g we can say) or 1.51m
The author marked this model as their own original creation.