This is designed to fit the Smok V8 Stick vape pen, and should be attached to a mounting surface with double-sided tape, or preferably Velcro tape The mounting face is knurled (mildly) to improve the interface between mounting surface and adhesive backing of mounting solution. There is an "elephant lip" to aid in vape pen insertion, and the interior of the pen cavity is castellated to reduce friction and wear, improving fitment. There is a battery vent hole to maintain safety, as well as vertical cutout holes which will improve the strength of the printed part (perimeters are stronger than infill)