Compatibility: Filter Holder Compatible With Cokin P Series Filters & Adapter Rings, also compatible with 84mm square filter system Product Material: This product is specially designed and made of plastic, with high service life and not easy to damage. Easy to install: Direct replacement without adjustment, perfect compatibility and high reliability. Product List: Product include a total of 4pcs Filter Holder, which can completely meet your daily use needs and replacement. Please confirm whether the above compatible models are consistent with your needs.