White fabric diffuser with white metal ring to fit various sizes of shades, please select from the dropdown menu. This diffuser is designed to work by sitting on the inner edge of drum (cylinder) shades that have an inner bottom 'lip'. These are not suitable for shades that do not have a inner bottom lip. Please note that all sizes are approximate and although sizes will match our own shades we cannot guarantee that they will fit other brands of shades that are similar size. Please contact us if you require any assistance with our range of diffusers.