This detailed riveted vertical boiler prop recreates a compact two-drum steam boiler complete with rivet rows, a circumferential flange, a front hinged rectangular access door with strap hinges and latch, a pressure gauge on the upper drum, multiple valves and pipe fittings, and a vertical sight glass assembly with brass-style end fittings. Modeled proportions follow the source image: overall height ≈ 2.8 × drum diameter, lower drum slightly taller than the upper. The reference photo had a white rectangular occlusion over the upper-right fittings; that area is represented as a transparent placeholder in the model to avoid inventing unseen parts. The listing includes one master STL at 1:87 (HO) scale. Print recommendations: orient upright on the lower drum base, use supports for hinge straps, gauge bezel and sight glass fittings, and use 0.12–0.20 mm layer heights for fine rivet definition. Ideal uses: industrial dioramas, HO model-railroad layouts, tabletop terrain, and painting practice. No additional scale STLs are included; scale the HO master in your slicer if you need a different printed size.

Available railroad scales: Z (1:220), N (1:160), HO (1:87.1), S (1:64), O (1:48)

Ready to print digital download in one piece with no assembly needed.

IMPORTANT: You are purchasing the file in the scale selected below.

Miniature Reality Makes practical, print-ready scenery and vehicles so you can economically fill out the background of your layout, diorama, or tabletop without paying centerpiece prices for everything (Our hobbies are dying because the average person can't afford to enjoy them, we want to help fix that). We want your miniature worlds to feel real and full of life - with more variety, more detail in every scene, and prices that won't hold you back.

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.
• Enforcement note: digital files may include purchaser-linked identifiers / forensic watermarking to help investigate unauthorized distribution.