Black Iron Register - Measures Inner Diameter: 10 in. (254 mm) by 8 in. (203 mm). Outer Diameter: 12 in. (305 mm) by 10 in. (254 mm). Comes with Louvers. These are individually cast in solid iron - durable and heavy for decades of service. The cast iron is approximately 0.2 in. thick (5 mm) and will easily hold over 400 lbs.

Black Iron Register - Measures Inner Diameter: 10 in. (254 mm) by 8 in. (203 mm). Outer Diameter: 12 in. (305 mm) by 10 in. (254 mm). Comes with Louvers. These are individually cast in solid iron - durable and heavy for decades of service. The cast iron is approximately 0.2 in. thick (5 mm) and will easily hold over 400 lbs.