Please Note: There is a Version 2 available which now includes self-aligning pegs to allow the lower spool to stay aligned when removing the spool above.  Here is the link for Version 2: [https://makerworld.com/en/models/2361157-vertical-stackable-filament-spool-spacer-holder-v2?profiled=2583435#profileId-2583407](https://makerworld.com/en/models/2361157-vertical-stackable-filament-spool-spacer-holder-v2?profiled=2583435#profileId-2583407)

Maximize your shelf space! Easily stack filament spools vertically with these simple, printable spacers—no more tangled piles or wasted room.

Problem

Stacked filament spools rub, slide, roll, and generally behave like they’ve had too much caffeine.

Solution

A tiny, lightweight spacer that fits over the Bambu Lab spool hub and keeps stacked spools separated without wasting filament or print time.

Why not just stack spools?

You can — but spacers:

• Prevent spools from rubbing and binding
• Keep stacks more stable if bumped
• Make it easier to grab a single spool
• Use almost no filament to do it

Why this design

• Minimal filament usage (~7-8 g per spacer)
• Fast print (minutes, not hours)
• No rods, no towers, no moving parts
• Sized for Bambu Lab / AMS-compatible spools
• Works on shelves, in closets, or storage bins

This is intentionally boring. Boring works.

Specifications

• Outer diameter: 70 mm
• Inner diameter: 55 mm (hub fit)
• Thickness: 8 mm

How many do I need?

• 1 spacer between spools is usually enough
• Use 2 per spool if you want extra separation or perfection

Use case

Perfect for:

• Closet shelves
• Open shelving
• Budget filament storage

Anyone who doesn’t want to print a filament organizer that uses half a spool of filament!!