Leaf Height: 117.5 mm Leaf Width: 28.6 mm Leaf Depth: 40.5 mm features: Soss concealed hinge For door thickness 41-45mm Suitable for 30 mins fire rated doors Min. 3 hinges per door leaf Zinc Alloy Hinge with plated steel links Opening angle 180 degree one way c/w Fixing Screws When fitting 3 hinges the centre hinge should be located one-half the distance from the horizontal centre line of the door to the centre line of the top hinge. Example. A door 760 mm wide that weighs 50 kg and is 44 mm thick would require 3 No Soss 218 hinges