Mechanical graphite refill leads KOH-I-NOOR 4390 7×7 mm, pack of 6

Pack of 6 KOH-I-NOOR 4390 graphite refill leads for mechanical pencils, each lead sized 7×7 mm. These cylindrical graphite refills are designed for drawing, sketching and technical drafting, and they fit compatible mechanical holders that accept 7×7 mm leads. The set supplies replacement leads for regular use and for detailed work, offering an economical option for artists, students and professionals who require consistent graphite quality and straightforward lead replacement.

Advantages

These KOH-I-NOOR leads deliver uniform graphite density and smooth application across paper surfaces. The 7×7 mm size provides stable insertion in compatible holders, reducing wobble and enabling precise strokes. Supplied as a pack of six, the refills are convenient to store and replace, ensuring uninterrupted use during drawing sessions or drafting tasks.

Suitable for

• Freehand drawing and sketching
• Technical drafting and architectural sketches
• Schoolwork and student practice
• Detailing and shading in illustrations

Key specifications

• Quantity: 6 leads per pack
• Material: graphite
• Shape and size: cylindrical, 7×7 mm
• Compatibility: holders accepting 7×7 mm graphite leads
• Intended use: drawing, sketching, technical drafting

How to use

Remove an empty or worn lead from the mechanical holder according to the holder's instructions, then insert a new 7×7 mm KOH-I-NOOR lead until it seats securely. Adjust the holder mechanism to expose the required working length of lead. Use steady pressure and appropriate paper grade for best results, and replace the lead when lines become faint or the tip wears down to maintain consistent line quality.

Usage recommendations

Store leads in a dry, stable container to prevent dusting and mechanical damage. For fine detail work, pair these leads with a holder that provides a firm grip and minimal play; for broader shading, use multiple strokes and vary pressure to achieve the desired tone.