NOTE THE BRASS IS DISCOLORED ON THIS ITEM. NOT NECESSARILY OBJECTIONABLE BUT CAN NOT BE SOLD AS "NEW". Brass plated extension for building new lamps or repairing older lamps, Brass Plated Offset Lamp Extension Pipe.....ADJUSTABLE LENGTH Hollow pipe....you can pass a wire through it. Brass Plated Two Piece Adjustable Extension for Lamp.... The brass pipe assembly is 9" and the bottom attaching nipple is 1". Adjustable in height from 12" to 17". Threaded top to accept lamp socket and bottom with nuts and washers as shown for fastening. Lamp cord can pass through the hollow pipe. The OD of the bottom pipe is 1/2".The OD of the inner pipe is 3/8". Offset is approximately 2-3/4 inch.