SMDV Alpha Speedbox-A90B - Professional 36 inch (90 cm) Quick Folding Dodecagon Softbox with Bowens Mount Patented quick-release folding speedring for fast and convenient setup Aluminum speedring and steel rods. Heat resistant to modeling lamp up to 300 watts. Dodecagon (12-sided) softbox with 90 cm (36") diameter High Quality Removable DOUBLE DIFFUSION PANELS for high quality soft light! With Bowens S-Type mount adapter