 "C2G RapidRun - coupling ring" " C2G ring 98015 Audio/Video Cables CDW.com
"Two coupling rings are provided with every PC (yellow) and Multimedia (blue) RapidRun runner cable for connecting break-away flying leads or wall plates. This 2-pack is available to replace those rings that are lost or misplaced.After installation, remove the pulling cap from the runner cable. Attach the coupling ring to the runner cable. Each end of the coupling ring has different threads. The knurled end will face away from the cable. Connect the break-away flying lead or wall plate to the runner cable via the coupling ring." 
 "GoPro Headstrap Mount + Quick Clip (GoPro Official Mount)" "Camera Supports & Stabilizers | Video Gear Outlet"
"Includes a Head Strap and a Quick Clip for a variety of head- mounting options. Fully adjustable to fit all sizes, the Head Strap can be worn over a helmet or directly on your head to capture footage from a headlamp-like perspective. The Quick Clip enables ultra-compact, low-profile mounting, and can be used to attach your GoPro to a backwards baseball cap or other 3mm to 10mm thick object." 