-adjustable hanger bars allow the housing to be positioned at any point within a 14"-24" joist span -UL listed for wiring ,damp 3"low voltage Non-IC New Construction Recessed Housing:Features:-Housing must be kept at least 3" away from insulation.-includes adjustable hanger bars(14"-25")with integral nail-Hanger fit onto T-bar spline for quich alignment-1/2" and romex wiring knockouts-NRTL listed ...