While there isn't a widely known retail product specifically named " HMM Gracel Set 64
| Feature | HMM Gracel Set 64 | Copic 72 Set | Staedtler Mars 36 | | :--- | :--- | :--- | :--- | | | Aluminum | Plastic | Wood/Polymer | | Ink Type | Archival Pigment | Alcohol Dye | Water-based | | Refillable | Yes (Full system) | Yes (Limited) | No | | Case Durability | Crush-resistant Metal | Cardboard/Fabric | Tin (Rust-prone) | | Price per Unit | High (Value) | Very High | Medium | hmm gracel set 64 high quality