test tube rack 3d model

3D technical model of a small object (5–6 cm), made of three flat translucent acrylic plates, each approximately 5 mm thick, stacked perfectly flat on top of each other when closed. All three plates share a common hinge along one long edge, similar to the spine of a notebook or notepad, allowing each plate to be opened independently. The hinge is integrated into the acrylic body, using wide rounded hinge knuckles and a single continuous metal pin. Each plate has exactly two hinge knuckles, arranged symmetrically along the hinge axis in the sequence 1–2–3–3–2–1. When closed, the three plates are fully aligned and flat. When one plate is opened, it lifts cleanly without interfering, revealing the plate below. Material is polished translucent acrylic, with smooth edges and internal fillets, possibly featuring cut-out cavities like a miniature paint palette. Show the model in isometric view, with one plate partially opened to demonstrate functionality. Style: clean technical render, neutral background, soft