This is a set of Kenko's 100mm wide square filter holder, a 77mm adapter ring, and a 67mm adapter ring. I believe that 100mm wide and 2mm thick filters from other companies can also be used. There is some wear and tear, but it is in reasonably good condition. Instant purchase is welcome, no price negotiation. You can quickly and easily attach Kenko square filters with a single touch by simply inserting them into the grooves on both sides of the multi-holder. There are three grooves, allowing you to stack two filters for shooting or to use different filters depending on the situation. Kenko square filters are available in two sizes: 76mm and 100mm wide. The "Multi-Holder 76" is suitable for 76mm wide filters, and the "Multi-Holder 100" is suitable for 100mm wide filters.