Fiberglass Receptacle Keyless Screw Terminals - A standard Fiberglass Receptacle.Fiberglass Receptacle Keyless Screw Terminals features include: 600 Watt 250 Volt Lampholder Top Wire Design Twist Lock Mounting Medium Base Fits 3-1/4&rdquo: or 4&rdquo: Box 4-1/2&rdquo: Outside Diameter Accepts Cages UL Listed Order Qty of 1 = 1 Piece Below is more info on our Fiberglass Receptacle Keyless Screw Terminals