Product details:

Ceiling Mount Arm Only. Flange sold separately. Solid brass construction Specify length when ordering. Available in lengths ranging from 2 in. to 42 in. 1/2 in. NPT nipple Specify finish when ordering. Meets or exceeds all applicable US Federal and State material regulations. Weight per Each: 0.40 lbs Length per Each: 3 in. Width per Each: 2 in. Height per Each: 2.0 in.