Hon&Guan 6 Dust Collection Fittings with 6 Inch Backdraft Damper

Durable Material The 6 inch backdraft damper make of galvanized steel with black powder coat finish and spring-loaded aluminum damper blades.And the overall length is 128mm, which is longer than most products., Lightweight Valve Wings The valve wings open under the pressure created by the airflow; when the air flows in the opposite direction, it is automatically closed under the action of the spring, so as to cut off the flow., Backdraft Shutter Hon&Guan vent damper 6 inch designed to improve ventilation by preventing air from re-circulating when the fans are not in use, An internal foam ring and two external fastening rubber rings help to increase air tightness.,Dust collection fittings, used for connecting ventilation fittings, suitable for 6 inch pvc pipe, inline duct fan, carbon filters, and 6 inch to 4 inch duct reducer.,Excellent material, the 6 inch pvc cap material has good hardness and softness, can perfectly fit all 6 inch accessories.