This is a Bowens 42" Reflector Disc. It has a silver and a gold side. Silver increases specular highlights and yields a high-contrast, cool tone image. Gold has a sunset effect and warms the scene producing healthy looking skin tones.
Bowens BO BW-3245 Features
Creates smooth, even reflections and give you control over your light source
Folds down to 1/3 of its open size and stores easily in its own bag