The puck is precision machined steel that has a articulating indicator arm with a micro adjustment head so the racer can make fine adjustments on the fly. Steel puck is heavy so sweeping the indicator across the floater to check it is an easy task on the granite table.
$279.00 For 50 millionths indicator .004" plus or minus .002", (two thousandths of a inch).
$611.25 For 25 millionths indicator .002", plus or minus .001", (one thousandths of a inch).
Both indicators have over travel protection to prevent over travel damage.