Koh-I-Noor Eraser 6521/40

Koh-I-Noor Eraser with the number model 6521/40 specifically indicates the large size of this eraser, which measures approximately 57 x 19.5 x 8 mm

The number 40 in the code often refers to a specific pack or batch size for wholesale purposes, although for the general consumer it identifies the size variant, such as 6521

Red (softer) part: This larger part of the eraser is designed to remove standard graphite lines from pencils of medium hardness (from H to 3B). It works by gently lifting graphite particles from the surface of the paper without excessive abrasion. This part is made from natural rubber materials, with no added plastic or phthalates, which is an important quality for those concerned about materials

Blue (harder/abrasive) part: The smaller, blue part is more abrasive and is specially formulated for erasing more stubborn, permanent marks. It is effective at removing lines and stains from ink, technical pens, and even typewriter lettering. The abrasive nature of this part removes embedded ink by essentially sanding away a thin layer of the paper surface, so it should be used carefully on delicate paper. It is worth noting that it is usually suitable for drawing ink, but is often not strong enough for modern fountain pen inks

Specifications Koh-I-Noor Eraser 6521/40 :