What is this?This ceiling light plate can be mounted on the ceiling floor to hang or hold the chandeliers, ceiling lamps. Widely used on home, office, bookstore or other somewhere.What will I get?Product Name: Ceiling Light PlateColor: SilverMaterial: Galvanized IronThickness: 1.5mm / 0.06"Round Hole Size: 10mm / 0.39"Oval Hole Size: 24x5mm / 0.95"x0.2"Hole Distance Range(Size A): 56mm to 96mm / 2.2" to 3.78"Overall Size(Size A): 104x18x17mm / 4.1"x0.71"x0.67" (L*W*H)Hole Distance Range(Size B): 35mm to 82mm / 1.38" to 3.23"Overall Size(Size B): 90x18x17mm / 3.54"x0.71"x0.67" (L*W*H)Package Content: 4 x 90mm Ceiling Light Plate (screws, nuts, and plugs included); 4 x 104 mm Ceiling Light Plate (screws, nuts, and plugs included)Are there any advantages of the product?Made of galvanized iron material, good rust resistance, long service life.Fasteners like screw and nut will help to fix the chandelier on the ceiling wall firmly.How to use it?Easy to use, just screw this ceiling light plate into a round ceiling light base.What should I notice?Please check the size before buying.