Anodized aluminum frame. Tan colored acrylic lens. Lid can be held open at any angle up to 90 degrees. 
 
Corner radius
Frame width     1.25"
 
Cutout   8.25" x 8.25" 
Cutout   10.25" x 10.25"
Cutout   16.5" x 16.5"        $269.99 
Cutout   17.75" x 17.75"
Cutout   20" x 20"              $374.99
Cutout   23.5" x 23.5"