Herm Sprenger - NeckTech Sport with ClicLock – Stainless Steel Black Matte 19"

The NeckTech Sport looks like a sleek flat metal collar but communicates like a prong — smooth curved links distribute pressure evenly with a slim profile along the neckline.
Push-button ClicLock: on and off in seconds, no pulling over the head
Fine-tune length with NeckTech Sport single elements (sold separately)
19" / 48cm, stainless steel black matte finish
Made in Germany by Herm. Sprenger