Black Box products can be conveniently purchased through a broad range of qualified distributors and resellers located around the globe

Black Box Explains...     
Category Wiring Standards
There are two primary organizations dedicated to developing and setting structured cabling standards.

CATx Bulk

ETL Verified and HDBaseT Recommended CAT5e, CAT6, and CAT6A backbone cable. 

When price matters most, choose this value-rated CAT5e and CAT6 bulk cable with a two-year warranty.
EYNC771A-1000_PCS
One of the largest selections in the industry of shielded and unshielded, solid and stranded CAT5e, CAT6, CAT6A cable. Cables are also HDBaseT Recommended.