411018-S&P 18″ X 18″ series 411 automatic exhaust damper. Max velocity of 2000 FPM.

411018-S&P 18″ X 18″ series 411 automatic exhaust damper. Max velocity of 2000 FPM.

Description

S&P 18″ X 18″ series 411 automatic exhaust damper. Max velocity of 2000 FPM.