StudioPRO 68 Inch Octagon Softbox Photography Light Diffuser & Modifier with Bowens Speedring Mount For Monolight Photo Studio Strobe Lighting (1) Octagon Softbox, (1) Bowens Speedring, (2) Diffuser Panels Fits StudioPRO 300W/s, 400W/s, & 600W/s This large 68" octagon softbox offers wider range of light diffusing and modifying for better coverage. Inner diffusion panel can be optional Material: Nylon