About this 3D model

This is a 12 inch storage rack that's mounted to the wall with some screws. The screw holes are 3mm wide with 9mm countersunk heads so a #6 or M3.5 should work fine. No supports or glue needed. The pegs are tightly fit and can be easily removed for customizing the rack. I printed mine in PETG-CF but PLA or ABS should be fine.