•Made of durable cast aluminum •Its low profile offers the advantage of fitting under an existing chimney cap or being very discreet on top of the chimney •Designed to help save in heating & cooling bills; prevent downdrafts & odors; keep out rain, snow, birds, & pests from entering the chimney, while limiting outside noise •Simple & ingenious system operates on a hinge point to allow opening and closing the shutter on a single pivot point which operates easily from inside your fireplace •System uses two types of seals that are never exposed to the outdoor elements & which promote one of the tightest seal, superior to similar dampers •30-ft. stainless steel cable & all mounting hardware included •Suitable for masonry chimney with an inside flue from 6 3/4″ x 6 3/4″ to 9″ x 9″