These Spira Brass solid brass Triago Door Knob from the Art Deco period adds a luxury touch to any door. These door knobs are unsprung and available in a mortice version only. Finish: Polished Brass. Dimensions: 55mm x 42mm Knob, 62mm Backplate, 52mm Projection. Sold & Supplied In Pairs. Complete With Square Spindle Bar & Fixings. Matching Accessories Available. It maintains great flexibility, as it can be used as a mortice knob since it's unsprung and comes in pairs. Triago Door Knob Specifications: Material: Brass. Length of Knob: Maximum 55mm. Width of Knob: Maximum 42mm. Backplate Length: 62mm. Backplate Width: 42mm. Projection: 52mm. Specifications: Dimensions: H:42.0 x W:52.0 x D:55.0 cm. Weight: 0.7 kg. Colour: Gold. Material: Brass. Model Number: SB2112PB.