Photoflex Umbrella Convertible 45" Photoflex adjustable reflective Umbrellas were already the most versatile photographic umbrellas available today; and now they're even better. This new design feature allows for almost carefree handling, all but eliminating damage caused from over bending delicate steel tube ribs. All umbrella center poles are extruded and closed off at the base (vs. folded, hollow tubes, like many other umbrellas, that are easily bent and dented) adding to the durability of the Photoflex umbrella model. The RUT 45" White Convertible Umbrella converts from a bounce umbrella to a "shoot through" umbrella, which produces soft light. Get the best of both shooting styles in one umbrella. Can be used for strobe or hot lights. Also available in 30" (UM-RUT30) and 60" (UM-RUT60). Shaft diameter is 8mm.