The Urth 67 40.5mm adapter ring is a practical accessory for photographers who wish to use a 75mm square filter holder. This adapter ring allows for the use of screw filters with a diameter of 40.5mm, thereby increasing flexibility in the selection and combination of filters. The adapter ring is made from durable material, ensuring a long lifespan and reliability. It is easy to attach and remove, allowing for straightforward handling during photography. With this adapter ring, various types of filters, such as polarising or ND filters, can be used effortlessly to create creative effects or control lighting conditions. The Urth adapter ring is thus a valuable addition to the equipment of photography enthusiasts looking to expand their options and enhance image quality.