Shape,Butterfly for Freehand Trick Material, Polycarbonate Weight 67 grams Shape,Butterfly for Freehand TrickMaterial, PolycarbonateBearing, 5x11x5, kkWeight 67 grams Outer Diameter (inches) 57mm/2.24 inches Width 38mm/ 1.5inches Response Type, Double O-Ring O-Ring Type, Flat Silicone O-Ring Gap Type, Adjustable