SWAY Combi Duo ballpen with two interchangeable tips easy to put together and separate again thanks to its rotation system. 5 double-ended pens with 10 ink colors available (barrel of the same color as ink). The full range allows up to 25 different combinations. Approximate writing length of 650 metres. 1 mm tip. Original design created by MILAN’s own R+D department. Size of pen: 13.7 x 1.7 cm. 1.2 cm Ø. Colours: blue - red, black - green, lilac - light green, pink - yellow, light blue - orange.