Marrteum 4 Pack Universal Light Crossbar Kit Ceiling Light Fixture Mounting Specification: Material: zinc plated steel Size: Outer diameter: 4inch Thickness: 0.055inch Color: silver Shape: round The package includes: 4pcs light fixture mounting plates 4pcs ground screws 12pcs wiring nuts 8pcs M4x25mm rail mounting screws 8pcs hex nuts The Package includes: 4 x light fixture mounting plates; 4 x ground screws; 8 x crossbar mounting screws; 8 x hex nuts; 12 x wiring nuts. Product size: The outer diameter of the light crossbar bracket is 4 inches and the thickness is 0.055 inch. Material: Made of zinc plated steel , durable and rust resistant for your safe use and reliability for a longer service life. Easy to use: The light mounting bracket adapter is designed to connect fixtures and canopies to electrical junction boxes, equipped with grounding screws, wiring nuts, and cross-bar mounting screws, You can use it to mount wall light easily. Wide Applications: suitable for most ceiling lights, wall-mounted lights, close to ceiling lights, LED lamps, chandeliers, bathroom vanity lamps, etc.