Prusa MK3MK3SMK3S under the bed storage box
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Prusa MK3/MK3S/MK3S+ under the bed storage box

2 boxes that fits the frame under the heated bed on any Prusa MK3MK3SMK3S No additional hardware needed! ...

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Prusa MK3/MK3S/MK3S+ under the bed storage box alternatives
Storage box
Allemool