This cast iron register with louvers adds beauty and character to any room in your home. From old home restoration to new construction traditional to contemporary this Acorn decorative air register compliments any style. It is solid durable and crafted with care. A flat head screwdriver can be used for adjusting (Not Included). Inner Dimensions: 12 x 6 . Outer Dimensions: 14 x 8 . Black Iron Finish.- SKU: ACRN235