Classic ball pen with replaceable cartridge, contains fast drying water-based gel ink housing made of very strong ABS plastic, a crack-resistant ball made of tungsten carbide - it is extremely hard and resistant to damage, so that the line retains its regular socket shape, in which the ball is embedded - made of high nickel brass profiled handle with non-slip grooves transparent casing allowing to control the condition of the cartridge with a clip and metallized tip housing elements in the colour of ink ball diameter: 0.7mm writing line thickness: approx. 0.33-0.35mm writing line length: approx.