Allstar Black Anodized Finish Adjustable Type Timing Pointer for Small Block Chevy with 7 inch Diameter ATI Harmonic Balancer features a timing pointer which is an adjustable type. It fits big block Chevy engines with a fluidampr harmonic balancer of 7 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.