Allstar Black Anodized Finish Adjustable Type Timing Pointer for Big Block Chevy with 8 inch Diameter Harmonic Balancer features a pointer which is an adjustable type and fits big block Chevy engines. It has a fluidampr harmonic balancer of 8 inches diameter. The pointer is black anodized and made from billet aluminum. The timing pointer is adjustable for very precise timing increments. It is backed by a 90-day limited factory and sold individually.