CT-496  Igniter Lead Connector Wear Gauge Igniter lead connector wear gauge for ARP670 type 2M fittings common to PT6 leads and others. Features a calibrated pin to measure connector wear. Opposite end sized to measure neoprene grommet expansion. Size: 21/2 in./6.35cm. Shipping weight: 4 oz./112g. Carton size: 31/2 in. X 11/4 in. X 11/4 in./8.89cm. X 3.18cm. X 3.18cm. Note: Many leads incorporate type 2M and 3M connectors at opposite ends. Both the CT-496 and CT-497 gauges are recommended.