The Interfit STR212 Strobies Pro-Flash Translucent Umbrella is a 39" (99cm) umbrella constructed of nylon fabric with a metal shaft and frame. It can be used to bounce light from your flash onto the scene for a soft, diffuse effect. Translucent umbrellas can even be shot through to provide a more diffuse effect. Also, the umbrella limits light loss to just one stop. The Pro-Flash umbrella feature a double-folding design and telescopic shaft that allows you to more easily store and transport it. It extends from 15.3" to 25.5" and has a shaft diameter of 8mm (0.31").