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.
Stainless Steel Fish Tank Converter - Bucket to Aquarium Adapter with Inverted Stand and Faucet Spout for Mineral Water Jugs
$13.58
Non-woven Cleaning Cloths, Lint-free Wiping Rags, Oil-absorbing Paper, Machine Cleaning Cloth, Dust Removal Cloth for Subway Use (No Washing Required)
$138.00
Large Paint Brush Set - Watercolor Pen Kit for Children's Day Art and Drawing
$31.25
Foldable Car Tire Stone Removal Tool, Explosion-Proof Scraper Hook for Extracting Pebbles from Tires
$19.53
Black Swan Watercolor, Gouache, and Acrylic Paint Brush Set - Professional Art Painting Tools for Numbered Paint-by-Number Kits
$6.80
Jiangchuan 800 Roll-to-Roll Oil-Heated Roller Heat Transfer Machine – Digital Sublimation Printer for Curtain Fabric Rolls
$147,743.75
Traditional Handcrafted Wooden Rattle for Newborns – Safe for Teething, Intangible Cultural Heritage Toy
$10.10
All-Season Quiet and Comfortable Vacuum Tires for Buick Enclave 2013-2014 - Custom Fit, Wear-Resistant
$458.00
Mia Core Paper Stump and Blending Knife Set, Double-Ended Blending Pen for Sketching, Art Student Drawing Tools (S/M/L)
$4.28
Feileniao Gongbi Painting Draft Sheets – Pre-Outlined Bird-and-Flower Designs on Sized Xuan Paper for Color Filling Practice
$8.42
Automatic Retractable Air Hose Reel, Electronic Drum, Water Drum, Yarn Clamp, Air Pump Hose for Auto Repair, Beauty, Gardening, and Washing
$280.00
LA Curved Surface Screen Printing Machine - Automatic Cup Printer, Cylindrical Net Printer for Cosmetic Bottles
$26,750.00
Bathroom Toilet Storage Rack - Over-Toilet Shelf for Bathroom, Restroom, Washing Machine with Flip Lid - Space-Saving Organizer
$59.00
Heavy-Duty Chain Slings for Lifting Rebar and Steel - Manganese Steel Lifting Chains
$113.00
Toilet Storage Rack - No-Drill Bathroom Organizer for Restrooms and Washrooms
$14.80
Shuhai Blanching and Scalding Machine Fully Automatic Fresh Steam FVJ Vegetable Cooking and Cooling Equipment Enoki Mushroom Shiitake Blanching Flow Cooling
$18,900.00
PELICAN 1020 Waterproof Case - Compact Protective Box for Earphones with Free Shipping
$40.00
Marie's Collapsible Brush Washing Bucket Art TEP Watercolor Chinese Painting Brush Rinser Portable Silicone Extendable Small Paint Washing Bucket for Art Students
$12.50
Duosoduoxi Black Series Paper Blending Stumps (6-Pack) - Elastic Xuan Paper Tools for Art Exams and Sketch Highlighting
$5.10
Factory Direct 502 Super Glue - Instant Adhesive, 3-Second Bond, High-Strength Fast-Drying Glue for Furniture and Wood Repair
$1.28
NORTON Industrial Red Scouring Pad for Stainless Steel Brushing, Polishing, and Rust Removal – Fine Grit Abrasive Cloth
$17.50
Bucket Pack Soft-Tip Glitter Markers, Non-Toxic Washable Color Pens for Student Art and Drawing, Gel Highlighters
$2.99
6-Piece Nylon Brush Set for DIY Aromatherapy Candles, Plaster Coloring, Outlining, Detailing, Gouache, Acrylics, and Baking
$1.28
Activated Carbon Filter, Quartz Sand Filter, Fiber Ball Filter, Wastewater Filter, Environmental Protection Equipment
$45,000.00
Factory Direct Vegetable Filling Processing Equipment - TMH Dumpling and Bun Filling Chopper for Cabbage and Vegetables
$12,155.40
Hairline Transplant | No-Shave Hair Restoration | 1-2000 Grafts with Velvet Texture & Pain Management by Medical Director
$29,800.00
Manufacturer Mini Donut Machine - Snack Food Equipment, 304 Stainless Steel Donut Maker for Puffed Foods
$3,760.00
Inverted Water Dispenser Stand for Large Bottles - Manual Pump Extractor for Mineral and Purified Water
$31.30
Press-to-Empty Hands-Free Hanging Sink Strainer Basket for Food Residue Separation
$7.48
Car Tire Stone Hook Stone Removal Tool Rust-Resistant Hook Multi-Function Tire Pick Scrape Stone Remover
$8.33
![[Customizable] Blank DIY Bookmarks - Thickened Hard Cardstock in Multiple Sizes with Tassels for Kindergarten and Elementary Art, Calligraphy, and Reading Gifts](https://www.gosteppe.com/cache/medium/product/386159/legacy-main-05a2e5e73e5ac60017fbef5e.webp)
