Designed specifically for NiSi V5, V5 Pro, V6 & C4 Filter Holders, enhancing lens capabilities Enables use of various filter thread lenses with 82mm thread on NiSi filter holders Constructed from durable, lightweight aluminum-alloy for long-lasting use Features a corrosion-resistant, black anodized finish for added durability and professional look Easy-to-use adapter ring, ideal for both professional photographers and hobbyists Affordably priced, high-quality product from a reputable brand in photography equipment