Modular Tunnel Liner Ring

A modular bored-tunnel liner segment, formed as a short cylindrical ring with a smooth grey outer shell and a ribbed terracotta-toned interior lining. The inner face is divided into curved, bolted panel sections with raised structural ribs, and the ends are shaped to join to matching rings.

The clean engineered form lets several segments be joined into a continuous tunnel bore.

Ideal for building a subway, rail, or road tunnel on a model railroad layout, an underground or infrastructure diorama, or a modern or sci-fi tunnel setting for a wargame table.

Miniature Reality Personal-Use License (No AI / No Resale)

• Allowed: personal printing for your own layouts, dioramas, tabletop games, and personal display.
• Not allowed: sharing or distributing the digital files (free or paid), re-uploading to any site, bundling, remix resale, or selling/redistributing printed outputs.
• Not allowed: using the files (or derivatives) to train, fine-tune, test, or feed any AI/ML system (including dataset creation).
• Not allowed: commercial use of any kind without a separate written commercial license from Miniature Reality.
• Note: digital files may include purchaser-linked identifiers / forensic watermarking to help investigate unauthorized distribution.