Perfect Lighting E26/ E27 Edison Bulbs Socket Holder Industrial Light Socket Vintage Edison 3.74ft Pendant Lamp Copper Holder (Bronze With Pull Chain) This is electrifier medium base copper shell lamp holder With hard paper in the socket inner, seismic and impact resistance Base: E27/E26; Wire of Length:3.74ft; Ceiling base diameter:3.85 inch Cap is 1/8" threaded for lamp nipple with set screw Not include Bulb