GraviTrax Compatible Tube / Tunnel slide for marble run Upgrade your GraviTrax builds with this tunnel slide. perfect for creating multi-level layouts and more advanced marble runs. ✅ Fully compatible with GraviTrax track pieces ✅ Stable and lightweight design for reliable builds ✅ Ideal for advanced layouts and creative expansion ✅ 3D printed with clean, modern styling Perfect for builders looking to add new dimensions to their marble runs and maximise space in complex layouts
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