Blueprint sleeve
thingiverse
Blueprint sleeve to keep prints from unrolling. This fits a 3.5" (88.9mm) diameter set of prints. One end it chamfered so print vertically with that end up.
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With this file you will be able to print Blueprint sleeve with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Blueprint sleeve.