The 20 Series offers a full rolled edge 24 gauge steel panel that is 1 3/4 in thick. The walk door comes standard as fully reversible in a 16 gauge, 3 1/2 in thick galvanized steel jamb. Three stainless steel 4 in hinges are standard. Quality double contact weather stripping is applied on the jamb allowing for greater leak protection. A dedicated, swing, threshold is also available, for extra protection. A handicap threshold is also available as an option. This door system has passed all ISDI ANSI code tests. This door is also available with an optional â€?"Certified Wind Labelâ€ť if needed.