Photogenic 36" x 48" Softbox with Speedring for Powerlights. (SB36X48)Photogenic Soft Boxes are constructed with a durable black silver laminated material and are complete with a handled travel bag. The spring tension rods easily fit into the soft box and into the mounting plate with speed ring. Each soft box has a heat release flap, a snap fit internal panel and a front diffusion panel. The front panel is Velcro fitted that will allow you to place the panel at the box edge or into the box 1. 5" for improved light