Mine de crayon HB Rotring Polymer Leads S0312700

Polymer Leads 1.0 HB by rOtring are high-polymer graphite refills designed for mechanical pencils. These 1.0 HB fine leads provide consistent line quality and reliable performance for writing and technical drawing. Packaged as spare leads, they are compatible with mechanical pencils that accept 1.0 mm refills and aim to deliver smooth, even marks with reduced breakage compared to standard leads.

Advantages

High-polymer composition increases strength and reduces the frequency of breakage, while the HB hardness balances darkness and durability for general-purpose use. The fine 1.0 mm diameter offers precise lines suitable for detailed sketches, notes, and technical work. rOtring manufacturing standards help ensure uniform diameter and consistent quality across refills.

Key specifications

• Brand: rOtring
• Product: Polymer Leads 1.0 HB
• Lead diameter: 1.0 mm
• Hardness: HB
• Material: high-polymer graphite

How to use

Insert a lead into a compatible mechanical pencil following the pencil manufacturer’s instructions. Advance the lead as needed during use. Replace broken or worn leads with fresh refills of the same diameter and hardness to maintain consistent writing quality.

Recommendations

Store leads in their original container to protect them from moisture and mechanical damage. Use with mechanical pencils specified for 1.0 mm leads and choose HB hardness for balanced darkness and strength.