Description
Reviews
| Brand | - |
| Category | Stationery, Educational Electronics & Office Supplies / Technical Pens |
| Origin | - |
| Brand | IERS |
| Series | 302 Technical Pen Series |
| Item Count | 9 Pens per Set |
| Ink Type | Waterproof Pigment Ink |
| Tip Material | Stainless Steel |
| Line Widths Included | 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm |
| Ideal For | Anime Sketching, Architecture, Illustration |
| Cap Design | Snap-on with Air-tight Seal |
| Body Color | Matte Black with Silver Accents |
| Package Weight | 180 grams |
Anonymous
Mar 29, 2026
Rating: 5/5
Truly waterproof
I tested these with alcohol markers and watercolors, and the ink did not bleed or smear at all. The variety of sizes in this 9-pack covers almost all my needs.
Anonymous
Mar 15, 2026
Rating: 4/5
Great value set
Good quality for the price. The 0.05mm tip is incredibly fine, though you need a steady hand. One pen arrived slightly loose in the cap, but it still works fine.
Anonymous
Mar 15, 2026
Rating: 5/5
Consistent line weight
As an architecture student, consistent line weight is crucial. The IERS 302 series delivers perfectly uniform lines every time. The grip is comfortable for long drawing sessions.
Anonymous
Mar 11, 2026
Rating: 5/5
Best upgrade from my old set
Switched from a cheaper brand and the difference is night and day. No more clogging or fading lines. The stainless steel tips feel durable and premium.
Anonymous
Mar 07, 2026
Rating: 5/5
Perfect for my manga projects
These pens glide smoothly over paper without skipping. The waterproof ink is a lifesaver when I add watercolor washes to my illustrations. Highly recommend for any serious artist.
Anonymous
Mar 01, 2026
Rating: 3/5
Good but caps are tight
The pens write beautifully, but the caps are very tight. It takes a bit of effort to pull them off, which might be tiring if you switch sizes frequently. Otherwise, solid performance.
Q: Does this set come with a carrying case?
A: Yes, the 9-pen set includes a sturdy plastic storage case with individual slots for each pen to keep them organized and protected.
Q: Is the 0.05mm tip durable enough for heavy use?
A: The stainless steel tips are quite durable, but extremely fine tips like 0.05mm require a light touch. Pressing too hard can bend the tip permanently.
Q: Can these be used on glossy photo paper?
A: While they work best on standard drawing paper or bristol board, they can be used on glossy surfaces; however, drying time may be slightly longer.
Q: Are these pens refillable?
A: No, the IERS 302 Series pens are designed as disposable units once the ink is depleted to ensure optimal tip performance and hygiene.
Q: What is the shelf life of the ink if left uncapped?
A: We strongly advise against leaving the pens uncapped. If left open for more than a few minutes, the tip may dry out and clog, affecting future performance.
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