Flexible case containing 4 P1 Silver pens whose body is the same color as the ink: blue, yellow, pink and green. Approximate writing length of 1200 metres. 1 mm tip. Ink manufactured in Germany. Original design, created by MILAN’s own R+D department.Measurements of pen: 14.1 x 1.7 cm. 1 cm O. The case allows you to fold the lid and have the pens arranged in a comfortable desktop display.