737 Series - Bullet Resistance Standard Features Bullet Resistant Level 2 Insulated 1-7/8 Inches Thick 16 Gauge Top & Bottom Channels Polystyrene Core 16 or 14 Gauge Bullet Resistant Plated Face Skin Fire Rated up to 3 Hours Sizes up to 40100 Max Rugged Perimeter Channel Construction For more detailed information, please see the link below. Find technical information here >>