Rubber specifications: material: natural rubber color: grey surface: smooth fiber strength: 4-6 Mpa hardness: 60 Shore tearing elongation: 450% density: 1,4 - 1,5 g/cm3 thickness: 2,3 mm szabványos méret?: 210x297mm (A4) Made of high quality natural rubber. The new manufacturing technique used results in high fiber strength with good characteristics as: resistance to various oils and acids as well as ageing and fraying. The rubber has shown good results in practice. It is easy to handle and there is no odor during laser engraving. It also enables perfect engraving and is ideal for stamp making. Ink retention on the rubber surface is very good which provides excellent print quality.