This is a remix of MasterFX's PLA Compatible Bag Clip. This
version is manifold and I made it longer for larger bags. Also check
out the double seal version http://www.thingiverse.com/thing:498030
It's actually a little over 4" long, but will fit on a 100x100 print bed if
you rotate the z axis 23 degrees and the re-center the part; although you either need to skip the skirt, or bring it in very close to the print
(around 0.5mm does work on a 100x100 print bed). It prints well
on my Printrbot SImple.
I printed in PLA with .2mm layers and 33% infill, no support.
Note that you'll need a well calibrated machine to get the hinge
to print so that it separates and swivels correctly.
Once complete, gently bend the parts back and forth holding it
near the center hinge. You'll feel it click loose and then should