This lamp shade has a top diameter of 6 inches a bm diameter of 10 inches and a slant height of 8 inches this attachment is called a washer attachment and is nickel in color. It is also known as a spider attachment. If your lamp has a harp then you will generally a washer attachment. The hole size inner-dimension of a washer attachment measures slightly under 1 2 inch. The drop on this paular attachment is 1 2 inch. That means it recesses about 1 2 inch below the top of the lamp shade. Fabric exterior translucent white styrene interior lampshade covering: navy made in usa harp and nial sold separately
