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.
6/8/12Pcs Silicone Red Wine Glass Identification Marker Char
$27.44
Stainless Steel Sink Drain Basket – Expandable Kitchen Dish and Vegetable Rack
$12.35
Tungsten Carbide Internal Thread Tool Holder – Anti-Vibration CNC Turning Insert for Small Bore Threading (CNR)
$73.02
Henkel Loctite SICOMET 8400 77 99 40 50 Instant Adhesive for Metal and Rubber with BS Accelerator
$69.00
Colored Pencil Set, Basswood Hexagonal Raw Wood Pencils for Painting and Art Coloring
$21.68
Small Ceramic Herb Jar – Imperial Yellow Hexagonal Double-Layer Container for Angong Niuhuang Wan Pills
$8.80
Spanish Brush Master ESCODA PERLA Pearl White Toray Nylon Round Watercolor Brush, Short Handle 1430
$44.20
Qiwei COD Rapid Detector QW-COD-T/B - Chemical Oxygen Demand Tester with Potassium Dichromate Digestion for Wastewater
$3,330.16
Natural Wheat Straw Baby Rattle - Children's Musical Instrument Toy, Maraca, Shaker Bell for Newborns - Orff Music Instrument
$10.80
CANDLE.LAB | 100% Cotton Unwaxed Candle Wick Roll - Thin Stem Chandelier Candle Making Supplies #31
$25.00
Pneumatic Rotary Vibrator - Feiyu GT25 Pneumatic Vibrator - Quality Guaranteed
$997.00
Quick-Frozen Vegetable Deodorizing Sterilization Washer IRW Zhongfang Ready-to-Cook Vegetable Production Washing Line Semi-Finished Vegetable Processing Oxygen Equipment
$27,000.00
KETELES 105R7120 Carbon Fiber Road Bike - Lightweight Racing Bicycle with Gear Shifter
$11,339.00
Natural White Crystal Sugar Cube DIY Crystal Jewelry Accessories Materials Irregular White Crystal Blocks
$2.50
Foldable Silicone Brush Washing Bucket - Portable Water Container for Calligraphy and Painting Students
$8.42
Cute Cartoon Bird Ceramic Brush Washer - Decorative Pen Cleaning Cup and Photo Prop
$12.60
Kitchen Storage Rack with Drainage Tray – Organizer for Dishcloths, Faucets, Sink Areas, and Dishwashing Supplies
$4.15
Sheng Y Graffiti Paint Brush Set, Children's Stationery Kit with Art Watercolor Pens, Factory Direct Gift Supplies
$49.10
Ningbo Manufacturer Display and Storage Rack, Wall-Mounted Tire Storage for Home Garage, Customizable Wall Tire Rack
$237.60
Universal Low-Temperature 3D Printing Pen Filament PCL, Eco-Friendly Material Wire 1.75mm Compatible with Deli Pens, 40 Color Options
$3.80
Automatic Feeder - Stainless Steel Food Machinery Accessory Equipment
$20,150.00
Henkel Loctite Super Glue Series: 401, 406, 460, 480, 495, 4011, 4161, 496, 382, 410
$28.00
Over-Toilet Storage Rack with Tissue Organizer for Bathroom, Vanity, and Shower Gel - Multi-Use Bathroom Shelf
$27.66
15-inch Carbon Fiber FPV Drone Frame - High-Strength Quadcopter Aerial Photography Chassis Direct Sale
$396.44
Petal-Shaped Ceramic Tea Scoop and Holder for Gongfu Tea Ceremony
$97.00
Scented Candle Waxing Cotton Wick with Base Wick Fixer Sticker DIY Materials
$0.35
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
![[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)
