Are you paying too much for your Roof Supports?

Our Cooper B-Line Dura-Blok Rooftop Supports are larger than the competition, competitively priced, easy to use, and just the right size for your job. Save money and improve your install at the same time!

Dura-Blok Features:


We proudly stock Cooper B-Line's Dura-Blok models DBM, DBP, and DB10.

Some examples of Durablok's many installation possibilities:

Cosco Hawaii has everything you need to get your job done right- We're Your Local One-Stop-Shop!