This QR40 softbox from Sirui helps you spread the light is especially for the C150X from Sirui. Just the way you want it. You fold it in and out easily, thanks to the special metal construction. Once unfolded, the QR40 softbox keeps its shape very well. And when folded, the softbox is compact to take with you. You do that in the included bag. Nicely organized, together with all supplied accessories. The Bowens connection is suitable for many light sources. For example from Sirui, StudioKing and Linkstar.