Material\nComposite design: two top layers made of longitudinal glass fibres absorb bending forces and ensure more rigidity than wooden rules.\nNo swelling with water contact, resistant to chemicals.\n\nJoints\nPlay-free, wear-free and dirt-resistant joint with spring pin for constant tension. Tight 90° and 180° latching of all joints.\n\nScale\nRed/black version:\nDeep-embossed white scale in 1 mm increments, white embossed tens scale.\nGrey/white version:\nDeep-embossed black scale in 1 mm increments, red embossed tens scale.\n\nAccuracy\nCE conformity, EU standard accuracy class II.\n\nExtra\nMetal ends which cannot be lost on the first and last segment.\nScale running backwards (recto and verso) enables reading from both sides.