Hohner Special 20 Magnetic Case

A compact protective case for the Hohner Special 20 diatonic harmonica, designed for durability, portability, and easy printing. This case consists of two 3D-printable parts (body and lid) that assemble without screws. The hinge uses a simple 50 mm piece of standard 1.75 mm filament as the pin, making assembly quick and tool-free. The lid closes securely using embedded neodymium magnets, keeping the harmonica protected while allowing fast one-hand opening. The model is optimized to print without supports and works well on most FDM printers. Features: • Designed specifically for Hohner Special 20 harmonicas • Magnetic closure for secure transport • Support-free printing • Tool-free hinge assembly using filament • Compact and pocket-friendly • Includes a Fusion 360 file (.f3d) for customization • Variants Included Two body versions are provided: • Standard body – clean minimalist design • Keychain version – includes a 3 mm channel to attach a cord, keyring, or wrist strap Hardware Required • 10 × Neodymium magnets Diameter: 5 mm Height: 1 mm • 1 × Filament hinge pin Length: 50 mm Diameter: 1.75 mm Printing Notes: • Prints without supports • Recommended layer height: 0.2 mm • 4 walls recommended for strength • PLA, PETG or ABS all work well Files Included: • Magnetic case body (standard) • Magnetic case body with keychain channel • Magnetic case lid • Fusion 360 (.f3d) source file for customization Compatibility: Designed for Hohner Special 20 diatonic harmonica (Other 10-hole harmonicas may fit, depending on dimensions.) Hope you find it useful! If you print it, please share a make!