The 180/5180 series curved blade grille feature individually adjustable blades and multiple discharge configurations. The 180/5180 blades are easily adjusted without the use of tools while tension springs on the deflector pivots maintain deflector position. Blade settings can be achieved to increase throw values up to 43% or decreased down to 36% of listed catalog throws. These grilles are an excellent choice for residential and commercial buildings where different throw lengths are needed for the same sized grille.