EXTECH – AN300-C Published September 3, 2015 at 1024 × 635 in EXTECH – AN300-C Accessory Kit for Airflow Measurements for Common Large Size Ducts Features: Compatible with AN300, AN310 and AN320 Anemometers Allows quick and easy air flow measurements for common large size duct sizes (8.26″/210mm round and 13.6/346mm square) ← Previous Next →