What is this?The socket ring helps to secure the lampshade to the lamp, great for holding lampshades for your table lamps, pendant lights, floor lamps, chandeliers.What will I get?Material: Zinc AlloyPitch: 2mmThread Diameter: 20mm / 0.79"Size: 28mm x 7mm / 1.1" x 0.27"(OD*H)Fit for G9 Threaded Ceramic SocketPackage Content: 10 Pcs x Light Socket RingAre there any advantages of the product?Great replacement for your old or broken lamp holder rings. Durable and convenient for you to use.How to use it?Easy to install, just screw on the socket to hold lamp shade.What should I notice?This socket ring only fits for G9 lamp holder with a thread diameter of 20mm, please measure your light socket before buying.