EGC5F2322 - Aluminum Egg-Crate Return Grille - 22" F23 Lay-InKrueger EGC5F2322 Aluminum Egg Crate Return Grille 22" F23 Lay In The EGC5 egg crate return grilles are designed to fit common commercial applications were the architect requires a return grille without bars on the face and with limited sight through the grille. The EGC5 offers 1 2 x 1 2 x 1 2 aluminum cube core and 1 1 4 flange. The EGC5 cube core design maximizes the free area making the EGC5 an excellent choice for applications requiring large