Standard CB Mic Keeper Snap Clip Mount System, Most popular thanks to the compact size, Is ideal for 80% of the users. Design Series: Carbon Graphite.

Gear Keeper® Retracting Tether suspends mic from headliner.
Grab Your Mic, Use It, Let It Go - It retracts back up to the headliner.
No more fumbling around trying to hang your mic . (includes mounting hardware to attach Gear Keeper® to Headliner)

Specifications 
Nylon Coated Stainless Steel Cable 
Stainless Steel Spring and Hardware
58,5 cm (23 inch) Extension 
255 gr (9 oz.) Retraction Force 
27,2 kg (60 lbs.) Breaking Strength 

Mounting System 
Snap Clip Mount
Attaches to D-Ring (included)