This product is made of durable PLA-CF material and can withstand long-term use. However, if the polarizing plate and the main body are exposed to an environment exceeding 60 degrees Celsius for an extended period, they may deform or their polarization performance may deteriorate. Due to the product being created with a 3D printer, there may be layer lines, but this does not affect its use. Also, there may be air bubbles between the acrylic and the filter, but this also does not affect its use. In photogrammetry, it is very important to take photos that remove shadows and highlights from the subject. By taking photos with this product in combination with a separately sold lens circular polarizing filter, you can achieve ideal photography that removes shadows and highlights from the subject. As a specific example, the 6th image is a photo taken of a glossy subject without using cross-polarization. The 7th image is a photo taken using cross-polarization. This product can be attached to the AR400 using magnets, making it very easy to attach and detach in the field. Please refer to the various information available on the internet for usage instructions. This product alone cannot be used for photography. Please prepare the AR400, camera, and lens circular polarizing filter yourself. 【Compatibility】 Compatible with Godox's WITSTRO AR400 strobe, and can be easily attached and used. - Brand: Godox - Model: WITSTRO AR400 - Materials: Linear polarizing film, PLA-CF, Acrylic - Color: Black Thank you for viewing. Polarization