Aluminum alloy end plug with rubber bushings for handlebar inner diameter 15-17mm and diameter 17-19mm Aluminum alloy rubber bushings with 2 attachable inner diameters: Diameter 0.6 - 0.7 inches (15 - 17 mm), Diameter 0.7 - 0.7 inches (17 - 19 mm), 1.5 oz (39 g) (pair).