5050 series 3 pedals have an aluminum/polycarbonate body, inner needle bearing/outer cartridge bearing and 10mm adjustable traction pins.The left pedal is indicated by a small grooved line around the threads of the spindleItem SpecificationsColorRed/BlackWeight433gIntended UseDH/FreerideMaterialAluminum/PolycarbonatePedal Spindle9/16"Spindle MaterialChromolyPedal TypePlatformDefined ColorRed