Product Description Smart Box Inc SBRND 24 Cube Round Ceiling Box From the Manufacturer The Smart Box Inc SBRND 24 Cube Round Ceiling Box has an adjustable depth and is a new work and old work ceiling box. It has extra depth for mounting all smoke detectors and carbon detectors. It can support fixtures up to 50 pounds. It is 24 Cubic Inch, 12-14, 10-12. Smart Box Inc was founded in 1999. On January 1, 2003 Smart Box Inc introduced their first line of non-metallic 1 to 4 gang multi-purpose device boxes. Each year since, Smart Box Inc has introduced another much needed box to the industry, and will continue to do so for many years to come. For this reason, Smart Box Inc has become the leading manufacturer of innovative non-metallic device boxes. The president and owner of Smart Box Inc is a 28 year working electrician. He is very familiar with jobsite problems and demands that the electrician has to face every day. For that reason, all features right down to the last detail in design are specific to the electrician's needs and for no other reason. When you use a Smart Box product, you can work with confidence knowing that you are working with the original and the absolute best multi-purpose device box on the market today.