Ready to use, install or paint. Your piece is 3D printed in your chosen filament colour and supplied unpainted. Enjoy it as it is or paint it to create your own finish.
Create a sheltered retreat beneath a rugged rock formation. Big Flat Cave has a broad, flattened roof, layered rock texture and an open entrance. Its two-part design joins to form one spacious-looking hide; choose from five supplied sizes to suit your enclosure and its available floor space.
At a glance
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Sizes: five supplied sizes, listed below. Custom sizing available.
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Material: PETG for aquarium and terrarium decor. Resists water and humidity; keep clear of direct heat lamps.
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Floats: Printed PETG pieces can float because they contain air. For aquarium use, secure the base with aquarium-safe silicone or a suitable aquarium adhesive as described under “Good to know”.
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Finish: unpainted, in the colour of your choice.
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Included: one cave hide in your chosen size. Plants, enclosure and other display accessories are not included.
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Made to order: ships within 7 business days.
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Free shipping: free delivery to Canada, the US and select European countries. Duties and import fees to the US are prepaid by us.
Sizes
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Size 1: 12.3 × 13.0 × 2.9 cm (4.8 × 5.1 × 1.1 in)
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Size 2: 15.4 × 16.3 × 3.6 cm (6.1 × 6.4 × 1.4 in)
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Size 3: 19.2 × 20.3 × 4.5 cm (7.6 × 8.0 × 1.8 in)
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Size 4: 24.0 × 25.4 × 5.6 cm (9.5 × 10.0 × 2.2 in)
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Size 5: 31.2 × 33.0 × 7.3 cm (12.3 × 13.0 × 2.9 in)
Approximate external width × depth × upright height, measured from the supplied model. One cave hide in the selected size is included. Each supplied size includes two main sections and matching joining pins that form one complete cave hide. External measurements do not describe the entrance or interior clearance; choose a size suitable for the animal you keep. Plants, enclosure and display accessories are not included. Custom sizes are available.
Need a different size? The listed variants are convenient standard sizes, not the limits of what we can make. Many designs can be resized in width, height and depth, and their proportions can be adjusted to better fit your enclosure. Small dimensional changes often do not materially affect the price; custom pricing depends on the final dimensions, material use and print time. Message Molten Modern with your enclosure dimensions for a custom quote.
Colours
First choose a finish (Basic, Matte, Marble, Sparkly/Galaxy/Metallic or Glow-in-the-Dark), then pick a colour from that finish. Sparkly/Galaxy/Metallic includes our Galaxy, Sparkly and Metallic colours. There are 89 PETG colours in total, and the colour charts at the end of the photos show each one. Want something that is not listed? Contact us and we will try to source it.
Good to know
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Anchoring in an aquarium: Bond the base to a flat stone or acrylic sheet with aquarium-safe silicone, or with hot glue or cyanoacrylate superglue specifically suitable for aquarium use. Follow the adhesive manufacturer’s surface preparation and full curing instructions before placing it in the aquarium. Where the design allows, a few small holes through the underside into enclosed air pockets let water in and air out, reducing buoyancy.
- Measure the inside of your enclosure before ordering, and leave a little room for installation. Choose dimensions and openings suited to the animals you keep.
- Some photos show hand-painted examples. This piece ships unpainted in your selected filament colour.
Design licensed to Molten Modern by novYTerra.