rugged protective case 3d model

Compact rugged rectangular hard-case top lid, standalone part only, industrial waterproof protective case style, optimized for FDM 3D printing, smooth plain flat top surface, minimal clearance design, tight fit tolerance, compact geometry, no unnecessary empty space, reinforced vertical external fins on outer side walls only, evenly spaced ribs for structural strength, rounded reinforced corners, integrated rear hinge mounts, centered front latch lock housing, latch pin hole for 3 mm diameter pin, 18 mm pin length, 2 mm exposed outside, matte black plastic material, clean hard-surface CAD design, symmetrical layout, mechanical functional geometry, Pelican-style rugged aesthetics, high-detail realistic 3D model, manifold geometry, suitable for STL and STEP conversion, precise dimensions, compact hinge area, compact latch area, white studio background, realistic industrial product render