Product Selection Guide BALCONY DOORS - PRODUCT COMPARISON EFCO KAWNEER OLD CASTLE BUILDING ENVELOPE US ALUMINUM YSD 400 Heavy Duty Sliding Glass Door Series 3000 (3-1/4 " Depth) 990 Sliding Door - Series 3000 (4-1/2 " depth) YSD 600 T Thermally Broken Architectural Sliding Glass Door Series 5XPT AA™ 3200 - - YSD 600 TH Thermally Broken Impact Resistant Architectural Sliding Glass Door Series 5XPT AA™ 3200IR - - YKK AP PRODUCT Page-30 PS-1000-08 | Effective Date: April 28, 2020