| Width | 5.2 |
| Height | 2.9 |
| NetWeight | 0.1 |
| Brand | Dianshi () |
| Manufacturer | Dianshi Pen Manufacturing () |
| Product Model | DS-790 |
| Product Name | Deep Sea Cabin Dolphin Fountain Pen (·) |
| Product Category | Fountain Pen |
| Nib Type | EF (Extra Fine) nib, small round tip () |
| Ink System | Anti-splash ink system with precision ink flow regulator for smooth, stable, and continuous ink output; no ink splatter or leakage |
| Ink Colors Available | Black, erasable blue, erasable dark blue |
| Pen Barrel Colors Available |
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| Green, blue, dark blue, pink |
| Pen Length | Approximately 19 cm (pen), approximately 14.5 cm (refill) |
| Target User | Suitable for students; EF nib produces fine, delicate handwriting |
| Packaging | Comes in a box |
| Additional Accessories | Compatible ink cartridges model DS-1020EF (small round tip refill) |
| Series | New series themed on deep sea ocean creatures, "Dreamlike Companionship" |
| Special Features | Self-regulating ink flow system with adjustable upper and lower ink density controls |
| Brand Slogan | "Dianshi Pen Manufacturing, we only make pens" |