This is a modified bracket for the the Quest Pro VR Panda head strap. I found that if you had the head strap too far back along the arms it blocks the speaker slots ! So at first I just recreated the brackets with slots in them to allow the sound to pass through, I then made them wider for more even weight distribution (less strain on the quest pro strap!) and finally added sound cups to increase volume into the ear. There is only one .STL as it fits both sides so just double up in your slicer.