A pack of 10 brass lamp rings for gentle room fragrancing. Lovely quality, 85mm in diameter, will fit large standard light bulbs. Just place the lamp ring on top of the light bulb in your lampshade, add fragrance oil to the well of the lamp ring, and switch on your lamp. Perfect for subtle home fragrancing. Note: Be careful not to overfill with fragrance oil and keep out of reach of childlren and pets, as fragrance oil may spill onto your surfaces and may damage them.