3D Printed Portal Weighted Companion Cube

Weighted Companion Cube (Portal 1) by Making Changes, Download free STL model

Companion Cube

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Portal Aperture

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2-foot Weighted Companion Cube 3D Model (link) by Dionogard on DeviantArt

CNC'd Portal Companion Cube

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Portal Weighted Companion Cube Box STL Files for 3D Printing