is this charcoal or...?

Nope. This is the bestest graphite ever made. Most soft and dark.

Is this a box of 12 individual 10B pencils?

The box of 12 that I received was labeled 10B, but the box contained HB - far different than 10B. When I asked for an exchange their answer was NO refund or exchange allowed.

Do the 10B pencils break easily when sharpening? What sharpener do you use? Has anyone used an electric sharpener with these?

They do not break easily. The sharpener I use is :https://www.amazon.com/MUJI-Small-White-pencil-sharpener/dp/B00E3MIDDC/ref=sr_1_1?ie=UTF8&qid=1469049989&sr=8-1&keywords=muji+pencil+sharpener

What is the inner diameter of the pencil (i.e., the diameter of the graphite)? I would guess 2mm since it is not specified as non-standard.

The diameter depends on the hardness/softness of the pencil. The harder the pencils the smaller diameters. I measured one of my 10B's and think it is about 3mm.

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Uni Hi-Uni Wooden Pencil - 10B - Box of 12 (HU10B)

Product ID: 11676087

Details

Age Range (Description)
Teens Adlut
Brand
uni
Color
brown brown
Ink Color
Black
Writing Instrument Form
Graphite

📦Box of 12 for uninterrupted creativity

🖤Smooth, rich black lines

✏️10B ultra-soft graphite core

116.10 DT

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Description

✏️ Elevate your craft with every stroke — don’t just write, create!

BULK BOX OF 12 - Stay ahead of your creative flow with a generous set designed for professionals who demand consistency.
ERGONOMIC ROUND BODY - Comfortable grip for long sessions, ambidextrous design suits every hand with ease.
VERSATILE ARTISTIC USE - Perfect for detailed miniature painting, design, and everyday writing—your all-in-one creative companion.
DURABLE BREAK RESISTANT - Engineered to minimize breakage, ensuring your ideas never get interrupted.
ULTRA SOFT 10 B GRAPHITE CORE - Experience buttery smooth strokes with deep, rich black lines that elevate every sketch and note.

The Uni Hi-Uni Wooden Pencil 10B set offers 12 premium-grade pencils featuring ultra-soft 10B graphite cores that deliver smooth, rich black lines ideal for writing, drawing, and detailed artistic work. Designed with a durable, break-resistant core and an ergonomic round body, these pencils provide comfort and reliability for professionals and creatives alike.

Specifications

ASIN	B001LOWNHC
Additional Features	Hardness: 5B
Age Range Description	Teens, Adlut
Best Sellers Rank	#40,861 in Office Products ( See Top 100 in Office Products ) #269 in Woodcase Lead Pencils
Body Shape	Round
Brand Name	uni
Color	brown, brown black
Customer Reviews	4.8 4.8 out of 5 stars (1,024)
Drill Point	Pencils
Global Trade Identification Number	04902778040942
Grip Type	Smooth
Hand Orientation	Ambidextrous
Hardness	5B
Included Components	Storage Case
Ink Color	Black
Item Dimensions	8.9 x 1.2 x 2.4 inches
Item Weight	6.08 ounces
Line Size	0.5mm
Manufacturer	Uni
Material Type	Plastic
Model Name	HU10B
Model Number	HU10B
Pattern	Single Item
Recommended Uses For Product	Writing
Style	10B
Unit Count	12 Count
Water Resistance Level	Not Water Resistant
Writing Instrument Form	Graphite Pencil
Writing Technique	pencil lead

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116.10 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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2 weeks ago

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