filament spool 3d model

Clear, deterministic description of the spool design (English) This object is a filament spool for 3D‑printing material. It must be modeled with the following exact dimensions: - Outer diameter: 120 millimeters - Central hole diameter: 60 millimeters - Total width of the spool: 45 millimeters - Flange thickness: 3 millimeters for each flange - Internal winding space: 39 millimeters (this is the space between the two flanges) - Geometry: two flat circular flanges connected by a cylindrical core; the core defines the 39‑millimeter winding space. - Additional feature: one rectangular side slot and one small side tab must be included exactly as shown in the reference shape, but their dimensions do not change the required global measurements listed above. The STL must match these dimensions exactly, with no scaling, no tolerance adjustments, and no alternative interpretations.