hollow cylinder 3d model

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Prompt

Generate 5 clean hollow PLA cylinders for 3D printing. All must be identical externally: outer radius 20 mm, length 50 mm, flat ends, smooth matte plastic, perfectly symmetrical, no bumps, holes, lights, spheres, or extra internal artifacts. Only wall thickness changes: 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, giving inner radii of 19, 18, 17, 16, 15 mm. Each cylinder must have a clean uniform cylindrical hollow center. Arrange them neatly in a row with spacing.

v3.1-20260211

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