LMP-103 is our mid-century replacement lamp plug. The mid century plug is an exact reproduction of a period piece and is made of dark plastic with embossed ridges. The diameter is 1 3/8" and is 5/8" high. The plug comes with an insulator and polarized prongs. Please note that this item ships in 5 to 7 days. If you are looking for the perfect touch for your vintage lamp, then look no further.