The EGC10 egg-crate return grilles are designed to fit common commercial applications were the architect requires a return grille without bars on the face. The EGC10 offers 1”x1”x1” aluminum cube core and 1 1/4” flange. The EGC10 cube core design maximizes the free area making the EGC10 an excellent choice for applications requiring large amounts of air to be returned through the return grille minimizing the pressure drop and sound.