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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三菱鉛筆鉛筆ハイユニ 10B 1ダース HU10B

Product ID: 747210061

Details

インクの色
ブラック
ブランド
uni
対象年齢
成年|子ども
筆記具の形状
グラファイトペンシル
色
ブラウンブラウンブラック

🎨Ultra-fine graphite particles for flawless shading

📏Precision 5B hardness for rich, smooth lines

✏️12 premium pencils per pack

$24.34

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Description

✏️ Elevate your craft with Japan’s legendary Hi-uni precision!

FOMO WORTHY QUALITY - Join thousands of discerning users who elevate their work with the iconic Hi-uni pencil.
MASTERFUL SMOOTHNESS - Experience buttery glide with every stroke, perfect for professionals and creatives alike.
VERSATILE EXCELLENCE - Ideal for writing, drawing, drafting, and crafting—your all-in-one creative companion.
ARTISTRY IN EVERY LINE - 10 billion ultra-fine graphite particles deliver deep, consistent blackness for stunning sketches and detailed work.
TRUSTED JAPANESE CRAFTSMANSHIP - From Mitsubishi, a brand synonymous with precision and quality in stationery.

The Mitsubishi Hi-uni 10B pencil set includes 12 high-grade 5B hardness pencils, featuring ultra-fine graphite particles for smooth, rich, and consistent lines. Renowned for its buttery writing feel and exceptional quality, it’s perfect for professionals, artists, and managers who demand precision and style in their writing and drawing tools.

Specifications

ASIN	B001LOWNHC
Amazon 売れ筋ランキング	文房具・オフィス用品 - 14,725位 ( 文房具・オフィス用品の売れ筋ランキングを見る ) 鉛筆 - 143位
GTIN (Global Trade Identification Number)	04902778040942
おすすめ度	4.3 5つ星のうち4.3 (425) var
お客様の年齢層	成年\|子ども
インク色	ブラック
カラー	ブラウン, ブラウンブラック
パターン	単品
ブランド名	uni
ペンの線幅	2mm_and_above
メーカー名	三菱鉛筆
ユニット数	1.00 個
利き手	両利き
商品の推奨用途	ライティング
商品の重量	0.38 ポンド
商品スタイル	10B
商品本体サイズ	22.6 x 3 x 6.1 cm
型番	HU10B
特殊機能	硬度:5B
筆記具の形態	グラファイトペンシル
筆記具の線の種類	鉛筆
素材	プラスチック
鉛筆の芯の硬さ	10B, 5B

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$24.34

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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三菱鉛筆 鉛筆 ハイユニ 10B 1ダース HU10B

Details

Details

Description

Specifications

Common Questions

三菱鉛筆鉛筆ハイユニ 10B 1ダース HU10B