The Regent Medium Bi Pen Fluorescent Lampholder 4000-C is a brand new industrial lighting fixture made in the United States. It has a model number of 64823 and is designed to hold fluorescent lamps. The lampholder has a length of 0.04 inches, a width of 0.01 inches, and a height of 0.01 inches. It weighs 0.18 pounds and comes with a package weight of 0.21 pounds. The manufacturer part number is 64823.