Used a few times for personal photography, so it's in good condition. Please check the images. H&Y Swift Magnetic Screw-in Adapter for Special Lens 62mm Swift Magnetic Adapter (also compatible with K-Series Holder Mark III) [A. Base] This product is exclusively for the REVORING Swift system and K-Series Mark III holder and is not compatible with products from other systems such as the EVO series, round magnetic filters, and other manufacturers' filters. This product corresponds to the "Base" of the Swift System. (It can also be used as an adapter ring for the K-Series Mark III holder.) Size: 62mm The Swift Magnetic Adapter (thin-frame adapter for wide-angle lenses) has a thin-frame design that minimizes vignetting even with wide-angle lenses. It screws onto the lens and has a magnetic mechanism on the front. When using it with the K-Series Mark III holder, the holder body is directly attached magnetically. (Not compatible with previous models like Mark II) When used with the "Base" of the Swift System, a "Bridge" can be attached on top, and then a square filter holder, matte box, or hood of the "Accessory" can be attached on top of that. REVORING is also an option for the "Base," and it has a thin-frame design to prevent vignetting even with wide-angle lenses. A dedicated cap can be attached magnetically, meeting the need to "move around with the adapter ring attached to the lens." https://hy-filter-japan.com/items/63f952d597c24563a2e7f14b [What is the REVORING Swift System?] The REVORING Swift system is a magnetic filter system that allows photographers and filmmakers to combine parts to suit their needs. The system is mainly composed of the REVORING, drop-in, and magnetic square filter mechanisms, which are patented by H&Y. The Swift system significantly saves attachment and detachment time and expands the possibilities of creative activities through countless filter combinations.