WAC Lighting HR-301M Low Voltage Remodel with Magnetic Transformer Dimmable 3" clearance on all sides when insulation is present J-Box and transformer accessible through ceiling Dimmable with electronic low voltage dimmers Suitable for chain wiring, damp locations and suitable for use in "shallow" joist installations Compatible with trims: HR-D321, HR-D324, HR-D325, HR-D326, HR-D327, HR-D329 HR-D329-s, HR-D332, HR-D333, HR-D334