Dr. Pulley Round Roller Weights 20x12 (10g) Size: 20x12, Set of 8 Dr. Pulley 20x12 Round Roller Weights for the Linhai 260/300, Yamaha Morphous 250, Yamaha Vino 125, Yamaha Zuma 125 and many more. Please select weight from drop-down menu. Lasts Longer Than Standard Roller Weights Excellent Heat Resistance Low Friction / Low Wear