Very high quality ND1000 K&F Concept square filter set consisting of glass filter, filter holder and lens adapters for the filter holder. The package is divided into 3 parts: 1. A bag with metal adapter rings for lenses with different diameters. 2. A box containing the filter and its leather carrying case. 3. A box with the filter holder. The adapter rings allow us to put the filter holder on any lens as we have a large number of different diameters. They are made of black metal and are well made. With inscription on each ring of the corresponding diameter. It is a square filter ND1000 100x100mm and 2mm thick. It allows us to remove 10 levels of light to make long exposures in daylight perfect. In the sample photo I posted it is taken at 30" midday. I love the play that can be taken out of this filter. The filter comes in a leather case and is covered with a tissue paper. The case is sturdy enough to protect it properly.The glass doesn't mark easily with fingers and doesn't attract dust.The filter holder is metallic with the part that the filters rest against being some kind of very hard plastic.They easily fit two 100x100 filter and also on the 100x150mm gradients.