The numerals "10 9" likely denote βa non-standard but purposeful size. Why not 8.5x11 or A4?
The phrase "repository magnetic 10 9 zip top" likely refers to a specific configuration of magnetic zip tie mounts cable management repositories repository magnetic 10 9 zip top
It features a primary zip top for long-term security (perfect for travel or rugged movement) and an integrated magnetic strip for "quick-draw" access when the zipper is left open. The numerals "10 9" likely denote βa non-standard