Lead Refill Staedtler Mars micro carbon 250 0.7mm B

Staedtler Mars micro carbon 250 0.7mm B refill leads provide smooth, jet-black lines and consistent performance for writing, sketching and technical drawing. The flexible 0.7 mm lead is engineered for high break resistance and fits all standard mechanical pencils; tubes contain 12 leads with ISO colour coding. The product is manufactured using an ecological process without PVC or softening agents and is made from more than 90% natural raw materials.

Advantages

The carbon-rich leads glide smoothly across paper and drawing card while producing dark, consistent B-grade lines. Flexibility in the core increases break resistance during normal use, and the eco-friendly manufacturing avoids PVC and softening agents. The universal 0.7 mm diameter is compatible with most mechanical pencils, and the tube refills hold 12 leads for convenient replacement.

Suitable for (tasks / use cases)

• Everyday writing and note-taking
• Sketching and shading in B hardness
• Technical drawing on paper and drawing card
• Use with standard 0.7 mm mechanical pencils

Key specifications

• Brand: Staedtler
• Model: Mars micro carbon 250
• MPN: 250 07-B
• EAN: 4007817213858
• Thickness: 0.7 mm
• Hardness: B (dark line)
• Quantity: 12 leads per tube
• Compatibility: fits all standard mechanical pencils
• Material: >90% natural raw materials; PVC- and softener-free production

How to use

Open the tube and remove a lead carefully to avoid breaking the core. Insert a lead into your 0.7 mm mechanical pencil according to the pencil’s refilling instructions. Use normal writing pressure; the flexible carbon core reduces the risk of breakage. Replace leads from the tube as needed.

Recommendations

For best results, store the tubes at room temperature and avoid exposing leads to heavy impact. Use the ISO colour coding to verify hardness when mixing different refills.