Washer Lampshade for Use on Desk Lamps or Floor Lamps with a Harp. The lampshade has a modern Rolled-Edge finish to it. Made in the USA. By request, you may specify changes to the dimensions, covering or the hardware color. (Extra charges may be necessary.) This shade is equipped with a Washer fitter. This is the most common fitter type. It consists of a small washer with an inner diameter hole size of approximately 1/2". The washer generally rests on the top of a metal harp above the light bulb and is held in place by a screw- on finial.