Extech AN300-C  

Extech AN300-C: Airflow Cone and Funnel Adapter Kit for AN300, AN310, AN320

Accessory Kit for Airflow Measurements for Common Large Size Ducts

The AN300-C is an airflow cone and funnel adapter kit. For use with AN300, AN310, AN320 meters. Accessory kit for airflow measurements in common large size ducts.