• 18 GAGE COLD ROLLED FORMED FRAME SYSTEM
• 2 1/4 Exterior Frame Depth
• Warranty on Finish up to 10 Years
• 3/16" to 1 1/4" Glazing

Optimum Window's FLeX series Cold rolled galvanized steel, bronze, or stainless steel windows & doors , sturdier yet slimmer frames...