What is this?These lamp finials cap widely used in holding the lamp shade in place and decorating the lamp harp. It is usually at a top of a lamp.What will I get?Product Name: Lamp Finials CapsColor: BronzeMaterial: Iron ElectroplatedThread Size: 1/4-27Overall Size: 18.5x12.8mm / 0.73"x0.5" (Diameter*Height)Package Content: 8 x Lamp Finials CapsAre there any advantages of the product?Made of iron material, electroplated surface, with rust resistance.How to use it?Just screw the caps on the lamp harp after installing the lamp shade.What should I notice?Please check the thread size before buying.