A simple headphone hooked intended to be mounted to the desktop screws of a Flexispot E7. I've designed it to stick out away from the desk, as I want my headphones to be out of the way, but didn't want to make even more holes in the desk.
I've recently authored an additional version of each main part - a bracket with a basic peg hook for a cable, and a larger headphone holder piece. The smaller holder worked great for headphones such as the Sony WH1000-XM3s, but larger straps on models like the Sennheiser HD58Xs kept falling off and needed the larger lip.
I printed screws and headphone hook printed with a 0.1mm layer height (to improve the threads), and the bracket with a 0.2mm layer height. Add dab of superglue to the screws, and don't over-tighten or the heads may come off. I printed in PLA+.