Testo 0554 4200 14" x 14" Balometer Flow Hood for Testo 420 is an alternative flow hood size for the Testo 420 Balometer.
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.