CFU Model - Fixed Base Curb-Mount Flat Roof Skylight - CurveTech Protective ISU Top Cover - Rough Opening: 59-1/8" x 39-7/16" - Exterior Frame: 67-1/2" x 47-13/16" - Laminated thermal pane for added safety, sound control and thermal protection - Insulated PVC frame - CurveTech glass lets rainwater easily roll off for a clean look while preventing leaks - Tempered glass is virtually scratch-proof providing a durable layer of protection - Unique curved glass with a modern and innovative design