New construction frame-in with collar for pre-wiring and easier layout planning.Dimensions: 4.33" x 4.33"Compatible Fixtures:NM2-2RDC: 2" M2 Round LED DownlightNM2-2RDCS: 2" M2 Round LED Lensed DownlightNM2-2RTLDC: 2" M2 Trimless Round LED D