"TPI Exhaust Fan Shutters are specifically designed for use with TPI commercial exhaust fans. U.S.A. Accessory Type Ventilation, Dimensions L x W x H in. 3 x 45 x 45, Material Type Aluminum. Designed for use with TPI commercial exhaust fans Shutter blade and frame constructed from aluminum for long-term corrosion resistance Fits 42in. fans Air open, gravity close Features weather stripping for tighter seals"
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