AMM6920 Features: -Natural rubber and lead weights to make this our most effective silencer band for ventilated rotors.. -Ventilated Rotor Silencer Band. -Repair only up to 1 yr. Product Type: -Parts & Accessories. Use: -Brake Rotor. Quantity: -Single. Dimensions: Overall Height - Top to Bottom: -0.5 Inches. Overall Width - Side to Side: -3.6 Inches. Overall Depth - Front to Back: -4.8 Inches. Overall Product Weight: -0.4 Pounds.