This is a PP clear case for shipping fountain pens and other writing instruments. It is a custom-made product with special cushioning material inside, both top and bottom. Due to shipping costs, we will sell in units of 10 to 1. We will include the corresponding number of poly bags for pens (30 x 180mm) that we sell. The price and shipping costs will change depending on the total number of pens. Size: Compatible diameter: 22mm Compatible length: 114.3 - 180.3mm Photos 3 and 4 show a Montblanc 149 inside for reference. (The fountain pen is not included.)