Honeywell ARD8TZ Round Automatic Damper, 8″

Honeywell Automatic Round Damper power-close, spring-open models ensure low leakage while controlling circulating air in heating, cooling and ventilation systems.
Product Dimensions ‏ : ‎ 8 x 8 x 10 inches; 0.01 ounces
Item model number ‏ : ‎ ARD8TZ
Date First Available ‏ : ‎ May 23, 2016
Manufacturer ‏ : ‎ Honeywell
ASIN ‏ : ‎ B01G1RAHPS
Features galvanized steel with single-blade damper, which closes off tightly against gasket for minimal leakage
Designated as power closed/spring return open damper for use with Honeywell Zoning Systems
Can be field-converted when used as an independent zone or for fresh air intake
Rated to operate up to 1-inch wc