Series DG extruded aluminum door grilles are designed to transfer air through doors or walls. The DG series include “V” shaped louvers mounted on a 70 degree angle providing a sight-proof appearance regardless of the viewing angle. The optional 2 side telescoping frame(model DGDF) adjusts to fit doors 1 1/16" to 2 1/8" thick, also available in a u-channel frame(model DG), and a 1 sided partition frame(model DGSF).