Plaster Frame:Architectural quality 0.050 galvanized steel ring riveted to elevated 0.064 steel junction box and ballast tray. * Clearance:Non-IC housings require a minimum clearance of 3" around from thermal insulation and 1/2" from combustible material from above the fixture. * Socket Cup:Socket cup adjusts vertically for optimum light performance. Die-cast fin construction for heat dissipation