Air Vent 9.5 in. H x 17.1 in. W Black Plastic Automatic Foundation Vent 17-1/2" x 8-1/2" x 6". Vent opens at 70 deg. and closes at 40 deg. 50 sq. in. net free area per pc. Eliminates excess moisture (summer) or heat loss (winter). Black. Easy to install hardware. Bi-metal coil. Features Eliminates excess moisture (summer) or heat loss (winter) Vent opens at 70 deg. and closes at 40 deg. 50 sq. in. net free area per pc Easy to install hardware 17-1/2" x 8-1/2" x 6" USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.