McMaster 8228T32 Safety Gate, Yellow Powder Coated Steel, for 25" to 27 1 2" Opening, Style B 3R418 For Minimum Nut Diameter 1 2 For Minimum Nut Diameter 1 2 in Includes Check Cage No need to shut these gates behind you—springs automatically do it for you Wall For Opening Size 25" to 27 1 2" Height 12" For Maximum Railing Diameter 2" For Maximum Railing Width 2" For Maximum Railing Depth 2" Arm Width 1 1 2" Arm Depth 1 4" Adjustment Mechanism Bolt Swing Angle 180° Spring Material Stainless Steel Number of Mounting Holes 6 Mounting Hole Diameter 11 16" Mounting Hardware Connecting Fasteners Included Closure Method Spring Mounting Plate Length 12" Mounting Plate Width 8" Mounting Position Left Hand Side