Plaster Frame: Architectural quality 0.050 galvanized steel ring riveted to elevated 0.064 steel junction boxand ballast tray * Clearance: Non-IC frame-ins require a minimum clearance of 3" around from thermal insulation and 1/2" from combustible material from above the fixture * Socket Cup: Die-cast formed galvanized steel with two 4-pin sockets * Bar Hangers: Two 13-3/4" to 24-1/2" adjustable bar hangers with captive nails are included on frame * Function Box: Prewired 25 cubic inch 0.064" thick galvanized steel, with five 1/2", two 3/4" knockouts, four Romex® pryouts, and snap on covers