LG Aluminum Sleeve-AXRGALA01 26-inch Wall Sleeve, Stamped Rear Grill, Silver Metallic Stamped aluminum rear grille for 26-inch wall sleeve Optional accessory to the LG AXSVA1 wall sleeve for through-the-wall air conditioners (sold separately) Prevents damage to the back outer coils of unit Prevents birds and small animals from nesting in the wall sleeve Color: Silver Metallic