The Urth 86 40.5mm adapter ring is a practical accessory for photographers who want to use a 100mm square filter holder. This adapter ring allows the use of screw filters with a diameter of 40.5mm, increasing flexibility in filter selection. The adapter ring is made from durable material, ensuring a long lifespan while providing ease of use. Its precise fit ensures a secure connection between the lens and the filter holder, contributing to optimal image quality. The Urth adapter ring is a valuable addition to the gear of photography enthusiasts looking to expand their creative options. With this product, various types of filters, such as polarizing or ND filters, can be easily used to achieve desired effects in photography. The adapter ring is lightweight and compact, making it ideal for transport and use on the go.