B&amp;P Lamp Lampshade Diffuser， 13.5 In Diameter， Fits 15 And 16 Inch Openings<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Made of pure white acrylic material with a slip 1/4-27 and 1/8IP center hole.</li><li>Removes light bulb glare</li><li>Translucent Diffuser - for mounting on top of the shade or in the case of hanging lamp shades both the top and bottom of Drum style lamp shades.</li><li>Directs light downward for accent or for improved reading light</li><li>13.5 In Diameter， Fits 13.5-16 Inch Openings(NOTE: Once adhesive paper is removed， no credit can be given if returned. Please make sure diffuser fits before removing paper.)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21Vo3mazMJL.jpg" noproxy>