Fixed Cap

I have a box of this kind of pens. Unluckily, I missed one cap of them and it makes the pen easy to mass and dry. In order to fix the problem, I designed a cap of it. The first time has failed because I measured the length of the pen but not the cap. Now I made the diameter of the cap bigger in order to fit in with the pen. If I have an another chance to do a fix project, I may find a more valuable target and then do it with totally correct information.