Gothic style bracket for 80mm Fire Extinguisher

This bracket is designed to support 80mm diameter round-bottomed fire extinguishers with a little more style than the conventional ones they come supplied with. It's got clamp arms to hold the extinguisher in place and a norman arch topped design. I've supplied in both with and without textured surfaces to that make the gothic effect more convincing. It can be fixed with with 4mm or 5mm screws, or there's recesses in the back to accomodate standard sized command strips

For printing you'll definitely need support. I've supplied some versions of the design with pre-made support structures that should be considerably more efficient than the auto-generated ones but you'll likely still need to have your slicer add support for the arms and for the opening in the base. If you use the textured one then your slicer is likely to complain a bit about issues with the model because the texture generator I use does that sometimes. It'll still print fine in modern slicers despite the complaints. 

I'd recommend the use of a strong and tough filament for this, PLA probably won't work very well, ABS or ASA should be fine. PETG might work out OK but you'll probably have to play with the number of walls to get the arms to have the right strength. I printed in ASA and used 1.8mm thick walls and 25% infill with a 0.15mm layer height.