Aperture Height: 300 mm Aperture Width: 600 mm Overall Size: 341 x 641 mm features: Single deflection grille Sizes are to suit hole aperture Single deflection supply grilles are suitable for duct, sidewall or ceiling applications Grille vanes are individually adjustable allowing air deflection to be set on site Frames and vanes are manufactured from HE9TF extruded aluminium with natural anodised satin powder coated finish as standard The frame is mitred with mechanically jointed corners and the - Tadpole - blades are assembled as a core at 20 mm centres The blade shown are mounted horizontally and are also available mouted vertically Frames are supplied with pre-punched holes in front face, unless otherwise requested Standard sizes are 100 x 100 mm to 1000 x 1000 mm in 50 mm increments Can be ordered with removable core Other sizes available on request All grilles take 10-14 days to manufacture