Custom made toolbox for Argon18 triathlon bike - specifially made for E117 size L, but should fit other models as well, I'm not sure about other sizes though. It is 185mm tall and can hold an inner tube, 2 CO2 cartridges, 2 tyre levers. 4 places for 10x1mm magnets to secure the lid. It hides nicely behind the Crono aero bottle. I can provide a pdf file with a view from a side so you can print and check how it will fit. Here is a link to the projection from one side: https://drive.google.com/file/d/1P4ccCx2Tj-nff32nej87PzRZSE-qBxPW/view?usp=sharing You can print it and try to fit between down tube and seat tube. Please ignore the dashed area on the lefthand side of the drawing (just cut it off) . It is just a piece that wraps around the seat tube.