This is a bike mini Pump (not inclouded max. diameter 22mm) and tube/ tubeless or accessory Patch kit Holder in a small Box (not included box dimensions 6.8x1.9x3.4cm) it fits to a seat stay with a diameter of 32mm.

To secure it to the Bike, you will need at best 3 small zip ties.

No supports needed. Lay it on the side with the hexagonals.

To secure the pump I use a 1cm wide Velcro strap with a hook and for the small box 2 of those 1cm wide Velcro straps with a hook because mine were too small. The inlay for the box is designed so that the Velcro strap (max 2mm) has an independent path that the box fits.

The CAD (for both with/without box Compartment) file is provided if you want to tinker with the design. 

Sorry for my bad english.