This is a matte box set from Neewer. It includes two 15mm aluminum rods, each 25cm long. The set also includes a clamp head with a lift function, an accessory clamp, and the matte box itself. It's designed for use with mirrorless cameras and similar setups. With a 15mm clamp, you can adapt it for shoulder rigs and other configurations. The matte box height is adjustable, but it doesn't accommodate filters. The aperture is 85mm, which is just about the maximum size for large-aperture lenses on single-lens reflex cameras, but it won't work for telephoto lenses. The matte box is made of plastic resin, while the other components are aluminum. A good option for those new to matte boxes.