KINGSO Ceiling Canopy Wall Sconce Mount LED Vintage Pendant Light Disc Base Lamp Holder 100mm(Flashing silver) 3 7/8"(about 100mm), 3/4"(about 20mm) tall Center hole fits 3/8 " (about10mm)in diameter Mounting screw holes are 2 3/4 " (about 70mm) center to center The unfinished steel canopies come wrapped up with a light layer of oil to prevent rust. If you want to maintain their look, only lightly wipe off the oil. If you want to rust/age them yourself or paint them, completely wash off the oil and you will have a bare steel piece Suitable for wall lamp, european-style lamp, Chinese style lamp, absorb dome light, lamp, restoring ancient ways the balcony, corridor, porch, corridor, studio, plant,installation and other DIY assembly using lighting lamps and lanterns, separation and disassemble because it is easy to assemble