Neewer&reg; (2) x 43" Diameter Photography Studio Collapsible Reflective Softbox Umbrella for Neewer Godox CowboyStudio StudioPRO Strobe Monolight and External Flash Speedlite The softbox umbrella's diameter is 43" when opened.Nylon white reflective fabric to soften and diffuse light in a more balanced way. Solid metal shaft enables the softbox umbrella to be mounted on stands or tripods. The wide openning at the central can help fit with most strobe flash light you want to mount. Easy to set up and use, come in handy when you need it. For better portability and convenience, they can be easily folded up into the provided carrying bag for easy storage!