This speedring insert is a replacement part for EZPro DLX Softboxes. By replacing the insert with a different model, you can mount the light modifier on almost any strobe or light, allowing you to expand your lighting or use the same modifiers for multiple setups. Features. Standard speedring insert for many light modifiers. All metal interchangeable speedring insert. Insert has an outer diameter of 5.2 inches 13.3 cmSpecifications. Size 5 in.. Weight 1 lbs