Each of the PortABox range has been developed with the mobile photographers in mine, taking up very little space in the gadget bag, each PortABox is supplied with a zip up flat packed carry case. The High grade materials are identical to the Interfit Pro Range of Softboxes well known for providing a high quality light source. The Snoot can be used to put light on the background if required or used as a single light source to produce a soft light above the model as you would with a beauty dish. To fit the PortAbox simply place it over the flashgun and wrap around the Velcro strap tighten as required. This STR155 Strobies PortAbox snoot is designed for use with Canon 580EX11 and Nikon SB900 flash units.