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 Downlight NM2-2RDCS: 2" M2 Round LED Lensed Downlight NM2-2RTLDC: 2" M2 Trimless Round LED Downlight NM2-2RG: 2" M2 Round LED Adjustable Gimbal NM2-2R270: 2" M2 Round LED Adjustable Elbow NM2-2SB: 2" M2 Square LED Baffle NM2-2SDC: 2" M2 Square LED Downlight