Shape, Butterfly with sid bearing cap for string tricks, 1A, 3A Material, aluminium Weight,64.5 grams Shape, Butterfly with sid bearing cap for string tricks, 1A, 3A Material, aluminium Bearing, 12.7x6.35x4.75mm/0.25x0.5x0.187inch Weight,64.5 grams Outer Diameter (inches),50.8MM/2 inches Width, 41.5mm/1.63inches Response Type, Double O-Ring Gap Type, fixed