22051 – Flexible case containing 4 P1 Copper edition pens whose body is the same color as the ink: noir, lilas, pink and green. Approximate writing length of 1200 metres. 1 mm tip. Original design, created by MILAN?s own R+D department. Measurements of pen: 14.x 1.7 cm. 1 cm ?. The case allows you to fold the lid and have the pens arranged in a comfortable desktop display.