The Schmidt large capacity refill P 900 with medium ballpoint is suitable for the LGNDR Brass Ballpoint Pen TWYST and available with either black or blue ink. Schmidt refills are known for their excellent quality and are entirely produced in Germany – including all components. The large capacity refill P 900 features a metal shaft and a ball made of tungsten carbide. The sealing plug at the end of the shaft corresponds to the ink color. The P 900 refill M – with a medium writing stroke – provides a writing length of up to 9,000 m. The LGNDR Brass Ballpoint Pen TWYST comes standard equipped with the large capacity cartridge P 900 M, supplied with black ink and medium writing stroke. Operation and refill replacement: To extend and retract the cartridge, twist the spring-loaded rotary mechanism of the LGNDR Brass Ballpoint Pen TWYST. To replace the used cartridge with a refill cartridge, simply unscrew the end of the LGNDR Ballpoint Pen and rescrew after the refill cartridge has been inserted.