This is a zipper which can be used for easier and faster closing of Ikea Istad bags.
We use them mostly in fridge or freezer, so there is a small hole where you can put 3x3mm or 3x5mm magnet and put it on fridge door.
There are two sizes, the first marked "M" for smaller bags and other marked with "L" for bigger bags..
STL preview doesn't show correct rotation during printing, so rotate it in slicer..
Hope you can find it useful too :-)
Devil Design PETG
Use small speeds, below 30mm/s.