Strong and smooth: The core of the pen is , the writing is smooth and clear, the black is not easy to fade, and the writing is lasting. Easy to use and carry, our storage box is made of hard plastic, allowing you to easily remove the pencil core pen. The small size makes very convenient and delicate, so that you can disassemble and carry. These pens are highly adaptable and perfectly matched with most pencils. They do not fade, high color rendering, smooth, and help you maintain perfect in daily writing and achieve lasting writing. The design of each lead assignor takes into account convenience and simplicity, and achieves precision and easy use. Suitable for all general writing applications, such as notes and letters Wire length: 60mm. Packing includes: 5 pieces/set of pencil lead filling materials Colour:As Shown Material:Resin Size:0.5mm Package Contents: 5 x Pencil Refills Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. These pens are highly adaptable and perfectly matched with most pencils. They do not fade, high color rendering, smooth, and help you maintain perfect in daily writing and achieve lasting writing. Strong and smooth: The core of the pen is , the writing is smooth and clear, the black is not easy to fade, and the writing is lasting. Wire length: 60mm. Packing includes: 5 pieces/set of pencil lead filling materials Easy to use and carry, our storage box is made of hard plastic, allowing you to easily remove the pencil core pen. The small size makes very convenient and delicate, so that you can disassemble and carry. The design of each lead assignor takes into account convenience and simplicity, and achieves precision and easy use. Suitable for all general writing applications, such as notes and letters