Adapter to fit : GEEETECH Moisture Proof Vacuum Bag for 3D Printer Filament, Reusable Vacuum Sealed Bags to Protect PLA ABS PETG TPU, 40 x 40 mm Vacuum Bag
https://www.amazon.co.uk/dp/B0B28V45P4?ref=ppx_yo2ov_dt_b_product_details&th=1
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The author marked this model as their own original creation.