The falcon eyes fer-sb40180hc softbox + honeycomb grid is 40 x 180 cm in size and is easy to assemble. the fer-sb40180hc is supplied with a detachable honeycomb grid, which can be used to direct the light. the outside of the softbox is black and the inside is lined with a silver reflective material, which ensures a high return of light and sufficient reflection. the fer-sb40180hc is supplied with a standard falcon eyes speed ring. this speed ring is compatible with all falcon eyes studio flash units except for the falcon eyes ss series. By using an additional speed ring adapter, the fer-sb40180hc is compatible with bowens, broncolor, elichrom, hensel, multiblitz and linkstar studio flash fer-sb40180hc can also be used as a softbox for your speedlite. to view these speed ring adapter rings, please see the optional accessories tab below. These softboxes are not suitable for halogen lamps, (such as the falcon eyes qlt-1000), due to the high heat generation of these lamps. the soft boxes from the sbq series are suitable for such types of lamps.