Stay cool and comfortable all summer long with the Keystone wall sleeve designed for your through-the-wall air conditioner. This sturdy and reliable sleeve not only keeps the elements at bay but also ensures that your cooling unit runs efficiently, so you can kick back and enjoy a refreshing breeze without any worries about dust or debris ruining your day. Size: One Size. Color: White. Gender: unisex. Age Group: adult. Material: NONE.