BIC 4 Colours® Fluo is a multicolored ballpoint pen with an original design. In addition to document-proof ink, it includes neon yellow for highlighting text passages. Four colors in one pen: blue, black, red, and neon yellow. Blue and black (line width 0.4 mm) are document-proof according to ISO 12757-2 standards. This means the ink is smudge-resistant, non-erasable, lightfast, water-resistant, and resistant to solvents and chemicals. Ideal for creating and signing important documents whose content must not be altered in any way. The intense neon yellow with a line width of 0.6 mm allows for strikingly marking information in the text. The red color is perfect for corrections or notes, rounding out the versatile application range of the four-color ballpoint pen. All refills are housed in a round, transparent plastic barrel for practical monitoring of the ink level. Colored push buttons simplify color selection. Additional details: Universally usable ballpoint pen with 4 colors in one pen, blue and black in document-proof ink (ISO 12757-2), red for corrections, including neon yellow for highlighting text passages, colored push buttons facilitate quick color selection, round barrel in transparent neon yellow for monitoring ink levels, line width: 0.4 mm, line width neon yellow: 0.6 mm.