9/16″ Pedal thread extension Stainless polished These adaptor bushings have a male 9/16″thread to fit into your 9/16″female thread. The ergotec pedal axle adapter serce to adjust the Q-factor (the distance between the two pedals) Length over all: 30 mm (~1,18 inches) Brings the pedal 18 mm (~0,71 inches) more out Weight 65 gr. (~0,14 pounds)/pair Perfect Quality