Amazon.com: Stagg NCC50RJRL 12-Inch Professional Network Cable with Reel : Electronics
Portable Cables Reels are built inside a Pelican for hand carry. PCRs are stackable and store electrical power, signal and fiber optic cables for easy transportation and deployment in the field.
3d printed cable roller and waterproof control box for a Schill GT380 reel to turn it into a ROV or robot tether by Piercet | Download free STL model | Printables.com