| Model Number | K521 |
| Manufacturer | Kingsure |
| Tip type | Full needle tip |
| Tip Material | Stainless steel |
| Tip Writing size | 0.38mm/0.5mm/0.7mm |
| Clip material | Metal |
| Ink color | Blue/ black/ red |
| Packing | Bulk/ Box |
| Features | Free ink system |
| Smooth writing at any angle | |
| Ideal for fast writing till the last drop of ink | |
| Ink conforms to ASTM D-4236 | |
| Replaceable refill | |
| Flash dry |
