The EGC15 egg-crate return grilles are designed to fit common commercial applications were the architect requires a return grille without bars on the face and the maximum available limited sight through the grille. The EGC15 offers 1/2”x1/2”x1” aluminum cube core and 1 1/4” flange. The EGC15 cube core design maximizes the free area making the EGC15 an excellent choice for applications requiring large amounts of air to be returned through the return grille minimizing the pressure drop and sound.